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Finding the Fourth Proportional to 71,143.79, 98,174.16 and 38,871.97

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Solution

The fourth proportional to 71,143.79, 98,174.16 and 38,871.97 is: 53,640.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,143.79 : 98,174.16 = 38,871.97 : x
  2. Step 2: Convert to fraction form
    71,143.79/98,174.16 = 38,871.97/x
  3. Step 3: Cross multiply
    71,143.79x = 98,174.16 × 38,871.97
  4. Step 4: Simplify right side
    71,143.79x = 3,816,223,002.30
  5. Step 5: Solve for x
    x = 3,816,223,002.30/71,143.79
  6. Step 6: Final answer
    x = 53,640.99

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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.