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Finding the Fourth Proportional to 159,900, 220,687.92 and 92,870.88

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Solution

The fourth proportional to 159,900, 220,687.92 and 92,870.88 is: 128,176.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,900 : 220,687.92 = 92,870.88 : x
  2. Step 2: Convert to fraction form
    159,900/220,687.92 = 92,870.88/x
  3. Step 3: Cross multiply
    159,900x = 220,687.92 × 92,870.88
  4. Step 4: Simplify right side
    159,900x = 20,495,481,335.77
  5. Step 5: Solve for x
    x = 20,495,481,335.77/159,900
  6. Step 6: Final answer
    x = 128,176.87

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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.