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Finding the Fourth Proportional to 156,387.64, 215,809.68 and 92,687.62

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Solution

The fourth proportional to 156,387.64, 215,809.68 and 92,687.62 is: 127,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,387.64 : 215,809.68 = 92,687.62 : x
  2. Step 2: Convert to fraction form
    156,387.64/215,809.68 = 92,687.62/x
  3. Step 3: Cross multiply
    156,387.64x = 215,809.68 × 92,687.62
  4. Step 4: Simplify right side
    156,387.64x = 20,002,885,612.16
  5. Step 5: Solve for x
    x = 20,002,885,612.16/156,387.64
  6. Step 6: Final answer
    x = 127,905.80

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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.