Home / 78,003,550.80-117,005,326.20-39,739,798.80

Finding the Fourth Proportional to 78,003,550.80, 117,005,326.20 and 39,739,798.80

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Solution

The fourth proportional to 78,003,550.80, 117,005,326.20 and 39,739,798.80 is: 59,609,698.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,550.80 : 117,005,326.20 = 39,739,798.80 : x
  2. Step 2: Convert to fraction form
    78,003,550.80/117,005,326.20 = 39,739,798.80/x
  3. Step 3: Cross multiply
    78,003,550.80x = 117,005,326.20 × 39,739,798.80
  4. Step 4: Simplify right side
    78,003,550.80x = 4,649,768,121,716,368
  5. Step 5: Solve for x
    x = 4,649,768,121,716,368/78,003,550.80
  6. Step 6: Final answer
    x = 59,609,698.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.