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Finding the Fourth Proportional to 158,731.92, 219,049.92 and 87,113.88

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Solution

The fourth proportional to 158,731.92, 219,049.92 and 87,113.88 is: 120,217.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,731.92 : 219,049.92 = 87,113.88 : x
  2. Step 2: Convert to fraction form
    158,731.92/219,049.92 = 87,113.88/x
  3. Step 3: Cross multiply
    158,731.92x = 219,049.92 × 87,113.88
  4. Step 4: Simplify right side
    158,731.92x = 19,082,288,444.89
  5. Step 5: Solve for x
    x = 19,082,288,444.89/158,731.92
  6. Step 6: Final answer
    x = 120,217.08

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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.