Home / 78,005,590.80-117,008,386.20-39,741,838.80

Finding the Fourth Proportional to 78,005,590.80, 117,008,386.20 and 39,741,838.80

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Solution

The fourth proportional to 78,005,590.80, 117,008,386.20 and 39,741,838.80 is: 59,612,758.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,005,590.80 : 117,008,386.20 = 39,741,838.80 : x
  2. Step 2: Convert to fraction form
    78,005,590.80/117,008,386.20 = 39,741,838.80/x
  3. Step 3: Cross multiply
    78,005,590.80x = 117,008,386.20 × 39,741,838.80
  4. Step 4: Simplify right side
    78,005,590.80x = 4,650,128,422,608,544
  5. Step 5: Solve for x
    x = 4,650,128,422,608,544/78,005,590.80
  6. Step 6: Final answer
    x = 59,612,758.20

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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.