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Finding the Fourth Proportional to 159,511.92, 220,136.28 and 87,891.92

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Solution

The fourth proportional to 159,511.92, 220,136.28 and 87,891.92 is: 121,296.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,511.92 : 220,136.28 = 87,891.92 : x
  2. Step 2: Convert to fraction form
    159,511.92/220,136.28 = 87,891.92/x
  3. Step 3: Cross multiply
    159,511.92x = 220,136.28 × 87,891.92
  4. Step 4: Simplify right side
    159,511.92x = 19,348,200,861.20
  5. Step 5: Solve for x
    x = 19,348,200,861.20/159,511.92
  6. Step 6: Final answer
    x = 121,296.27

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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.