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Finding the Fourth Proportional to 71,677.01, 98,907.17 and 39,842.81

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Solution

The fourth proportional to 71,677.01, 98,907.17 and 39,842.81 is: 54,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,677.01 : 98,907.17 = 39,842.81 : x
  2. Step 2: Convert to fraction form
    71,677.01/98,907.17 = 39,842.81/x
  3. Step 3: Cross multiply
    71,677.01x = 98,907.17 × 39,842.81
  4. Step 4: Simplify right side
    71,677.01x = 3,940,739,382.73
  5. Step 5: Solve for x
    x = 3,940,739,382.73/71,677.01
  6. Step 6: Final answer
    x = 54,979.13

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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.