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Finding the Fourth Proportional to 65,550.28, 90,471 and 38,691.04

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Solution

The fourth proportional to 65,550.28, 90,471 and 38,691.04 is: 53,400.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,550.28 : 90,471 = 38,691.04 : x
  2. Step 2: Convert to fraction form
    65,550.28/90,471 = 38,691.04/x
  3. Step 3: Cross multiply
    65,550.28x = 90,471 × 38,691.04
  4. Step 4: Simplify right side
    65,550.28x = 3,500,417,079.84
  5. Step 5: Solve for x
    x = 3,500,417,079.84/65,550.28
  6. Step 6: Final answer
    x = 53,400.49

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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.