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Finding the Fourth Proportional to 156,305.04, 215,700.66 and 84,687

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Solution

The fourth proportional to 156,305.04, 215,700.66 and 84,687 is: 116,867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,305.04 : 215,700.66 = 84,687 : x
  2. Step 2: Convert to fraction form
    156,305.04/215,700.66 = 84,687/x
  3. Step 3: Cross multiply
    156,305.04x = 215,700.66 × 84,687
  4. Step 4: Simplify right side
    156,305.04x = 18,267,041,793.42
  5. Step 5: Solve for x
    x = 18,267,041,793.42/156,305.04
  6. Step 6: Final answer
    x = 116,867.90

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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.