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Finding the Fourth Proportional to 156,434.73, 215,884.18 and 88,461.87

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Solution

The fourth proportional to 156,434.73, 215,884.18 and 88,461.87 is: 122,079.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,434.73 : 215,884.18 = 88,461.87 : x
  2. Step 2: Convert to fraction form
    156,434.73/215,884.18 = 88,461.87/x
  3. Step 3: Cross multiply
    156,434.73x = 215,884.18 × 88,461.87
  4. Step 4: Simplify right side
    156,434.73x = 19,097,518,045.06
  5. Step 5: Solve for x
    x = 19,097,518,045.06/156,434.73
  6. Step 6: Final answer
    x = 122,079.78

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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.