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Finding the Fourth Proportional to 156,691.78, 216,248.04 and 88,720.72

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Solution

The fourth proportional to 156,691.78, 216,248.04 and 88,720.72 is: 122,442.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,691.78 : 216,248.04 = 88,720.72 : x
  2. Step 2: Convert to fraction form
    156,691.78/216,248.04 = 88,720.72/x
  3. Step 3: Cross multiply
    156,691.78x = 216,248.04 × 88,720.72
  4. Step 4: Simplify right side
    156,691.78x = 19,185,681,807.39
  5. Step 5: Solve for x
    x = 19,185,681,807.39/156,691.78
  6. Step 6: Final answer
    x = 122,442.17

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1.5x scale

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.