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Finding the Fourth Proportional to 69,943.97, 96,519.65 and 39,729.20

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Solution

The fourth proportional to 69,943.97, 96,519.65 and 39,729.20 is: 54,824.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,943.97 : 96,519.65 = 39,729.20 : x
  2. Step 2: Convert to fraction form
    69,943.97/96,519.65 = 39,729.20/x
  3. Step 3: Cross multiply
    69,943.97x = 96,519.65 × 39,729.20
  4. Step 4: Simplify right side
    69,943.97x = 3,834,648,478.78
  5. Step 5: Solve for x
    x = 3,834,648,478.78/69,943.97
  6. Step 6: Final answer
    x = 54,824.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.