Home / 78,003,146.80-117,004,720.20-39,739,394.80

Finding the Fourth Proportional to 78,003,146.80, 117,004,720.20 and 39,739,394.80

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Solution

The fourth proportional to 78,003,146.80, 117,004,720.20 and 39,739,394.80 is: 59,609,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,146.80 : 117,004,720.20 = 39,739,394.80 : x
  2. Step 2: Convert to fraction form
    78,003,146.80/117,004,720.20 = 39,739,394.80/x
  3. Step 3: Cross multiply
    78,003,146.80x = 117,004,720.20 × 39,739,394.80
  4. Step 4: Simplify right side
    78,003,146.80x = 4,649,696,769,491,335
  5. Step 5: Solve for x
    x = 4,649,696,769,491,335/78,003,146.80
  6. Step 6: Final answer
    x = 59,609,092.20

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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.