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Finding the Fourth Proportional to 127,728.64, 191,592.96 and 38,982.61

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Solution

The fourth proportional to 127,728.64, 191,592.96 and 38,982.61 is: 58,473.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,728.64 : 191,592.96 = 38,982.61 : x
  2. Step 2: Convert to fraction form
    127,728.64/191,592.96 = 38,982.61/x
  3. Step 3: Cross multiply
    127,728.64x = 191,592.96 × 38,982.61
  4. Step 4: Simplify right side
    127,728.64x = 7,468,793,638.43
  5. Step 5: Solve for x
    x = 7,468,793,638.43/127,728.64
  6. Step 6: Final answer
    x = 58,473.92

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1.5x scale

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.