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Finding the Fourth Proportional to 159,939.40, 239,793.90 and 89,840.20

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Solution

The fourth proportional to 159,939.40, 239,793.90 and 89,840.20 is: 134,695.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,939.40 : 239,793.90 = 89,840.20 : x
  2. Step 2: Convert to fraction form
    159,939.40/239,793.90 = 89,840.20/x
  3. Step 3: Cross multiply
    159,939.40x = 239,793.90 × 89,840.20
  4. Step 4: Simplify right side
    159,939.40x = 21,543,131,934.78
  5. Step 5: Solve for x
    x = 21,543,131,934.78/159,939.40
  6. Step 6: Final answer
    x = 134,695.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.