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Finding the Fourth Proportional to 71,497.38, 98,666.51 and 39,666.29

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Solution

The fourth proportional to 71,497.38, 98,666.51 and 39,666.29 is: 54,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,497.38 : 98,666.51 = 39,666.29 : x
  2. Step 2: Convert to fraction form
    71,497.38/98,666.51 = 39,666.29/x
  3. Step 3: Cross multiply
    71,497.38x = 98,666.51 × 39,666.29
  4. Step 4: Simplify right side
    71,497.38x = 3,913,734,398.95
  5. Step 5: Solve for x
    x = 3,913,734,398.95/71,497.38
  6. Step 6: Final answer
    x = 54,739.55

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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.