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Finding the Fourth Proportional to 156,691.90, 234,940.65 and 90,099.10

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Solution

The fourth proportional to 156,691.90, 234,940.65 and 90,099.10 is: 135,092.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,691.90 : 234,940.65 = 90,099.10 : x
  2. Step 2: Convert to fraction form
    156,691.90/234,940.65 = 90,099.10/x
  3. Step 3: Cross multiply
    156,691.90x = 234,940.65 × 90,099.10
  4. Step 4: Simplify right side
    156,691.90x = 21,167,941,118.42
  5. Step 5: Solve for x
    x = 21,167,941,118.42/156,691.90
  6. Step 6: Final answer
    x = 135,092.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.