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Finding the Fourth Proportional to 97,728.20, 146,640.90 and 38,565.80

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Solution

The fourth proportional to 97,728.20, 146,640.90 and 38,565.80 is: 57,867.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,728.20 : 146,640.90 = 38,565.80 : x
  2. Step 2: Convert to fraction form
    97,728.20/146,640.90 = 38,565.80/x
  3. Step 3: Cross multiply
    97,728.20x = 146,640.90 × 38,565.80
  4. Step 4: Simplify right side
    97,728.20x = 5,655,323,621.22
  5. Step 5: Solve for x
    x = 5,655,323,621.22/97,728.20
  6. Step 6: Final answer
    x = 57,867.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.