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Finding the Fourth Proportional to 159,221.92, 219,726.61 and 87,606.55

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Solution

The fourth proportional to 159,221.92, 219,726.61 and 87,606.55 is: 120,897.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,221.92 : 219,726.61 = 87,606.55 : x
  2. Step 2: Convert to fraction form
    159,221.92/219,726.61 = 87,606.55/x
  3. Step 3: Cross multiply
    159,221.92x = 219,726.61 × 87,606.55
  4. Step 4: Simplify right side
    159,221.92x = 19,249,490,245.30
  5. Step 5: Solve for x
    x = 19,249,490,245.30/159,221.92
  6. Step 6: Final answer
    x = 120,897.24

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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.