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Finding the Fourth Proportional to 156,800.08, 216,375.91 and 85,179.88

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Solution

The fourth proportional to 156,800.08, 216,375.91 and 85,179.88 is: 117,543.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,800.08 : 216,375.91 = 85,179.88 : x
  2. Step 2: Convert to fraction form
    156,800.08/216,375.91 = 85,179.88/x
  3. Step 3: Cross multiply
    156,800.08x = 216,375.91 × 85,179.88
  4. Step 4: Simplify right side
    156,800.08x = 18,430,874,048.69
  5. Step 5: Solve for x
    x = 18,430,874,048.69/156,800.08
  6. Step 6: Final answer
    x = 117,543.78

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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.