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Finding the Fourth Proportional to 156,439.26, 215,884.17 and 84,819.06

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Solution

The fourth proportional to 156,439.26, 215,884.17 and 84,819.06 is: 117,049.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,439.26 : 215,884.17 = 84,819.06 : x
  2. Step 2: Convert to fraction form
    156,439.26/215,884.17 = 84,819.06/x
  3. Step 3: Cross multiply
    156,439.26x = 215,884.17 × 84,819.06
  4. Step 4: Simplify right side
    156,439.26x = 18,311,092,368.28
  5. Step 5: Solve for x
    x = 18,311,092,368.28/156,439.26
  6. Step 6: Final answer
    x = 117,049.21

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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.