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Finding the Fourth Proportional to 72,012.71, 99,383.13 and 39,753.65

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Solution

The fourth proportional to 72,012.71, 99,383.13 and 39,753.65 is: 54,863.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,012.71 : 99,383.13 = 39,753.65 : x
  2. Step 2: Convert to fraction form
    72,012.71/99,383.13 = 39,753.65/x
  3. Step 3: Cross multiply
    72,012.71x = 99,383.13 × 39,753.65
  4. Step 4: Simplify right side
    72,012.71x = 3,950,842,414.38
  5. Step 5: Solve for x
    x = 3,950,842,414.38/72,012.71
  6. Step 6: Final answer
    x = 54,863.12

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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.