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Finding the Fourth Proportional to 71,525.97, 98,691.21 and 39,688.11

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Solution

The fourth proportional to 71,525.97, 98,691.21 and 39,688.11 is: 54,761.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,525.97 : 98,691.21 = 39,688.11 : x
  2. Step 2: Convert to fraction form
    71,525.97/98,691.21 = 39,688.11/x
  3. Step 3: Cross multiply
    71,525.97x = 98,691.21 × 39,688.11
  4. Step 4: Simplify right side
    71,525.97x = 3,916,867,598.51
  5. Step 5: Solve for x
    x = 3,916,867,598.51/71,525.97
  6. Step 6: Final answer
    x = 54,761.47

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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.