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Finding the Fourth Proportional to 156,318.86, 215,755.45 and 88,375.15

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Solution

The fourth proportional to 156,318.86, 215,755.45 and 88,375.15 is: 121,977.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,318.86 : 215,755.45 = 88,375.15 : x
  2. Step 2: Convert to fraction form
    156,318.86/215,755.45 = 88,375.15/x
  3. Step 3: Cross multiply
    156,318.86x = 215,755.45 × 88,375.15
  4. Step 4: Simplify right side
    156,318.86x = 19,067,420,305.82
  5. Step 5: Solve for x
    x = 19,067,420,305.82/156,318.86
  6. Step 6: Final answer
    x = 121,977.73

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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.