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Finding the Fourth Proportional to 156,631.62, 216,149.19 and 85,011.02

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Solution

The fourth proportional to 156,631.62, 216,149.19 and 85,011.02 is: 117,313.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,631.62 : 216,149.19 = 85,011.02 : x
  2. Step 2: Convert to fraction form
    156,631.62/216,149.19 = 85,011.02/x
  3. Step 3: Cross multiply
    156,631.62x = 216,149.19 × 85,011.02
  4. Step 4: Simplify right side
    156,631.62x = 18,375,062,033.33
  5. Step 5: Solve for x
    x = 18,375,062,033.33/156,631.62
  6. Step 6: Final answer
    x = 117,313.87

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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.