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Finding the Fourth Proportional to 159,519.80, 220,146.99 and 87,899.74

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Solution

The fourth proportional to 159,519.80, 220,146.99 and 87,899.74 is: 121,306.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,519.80 : 220,146.99 = 87,899.74 : x
  2. Step 2: Convert to fraction form
    159,519.80/220,146.99 = 87,899.74/x
  3. Step 3: Cross multiply
    159,519.80x = 220,146.99 × 87,899.74
  4. Step 4: Simplify right side
    159,519.80x = 19,350,863,182.78
  5. Step 5: Solve for x
    x = 19,350,863,182.78/159,519.80
  6. Step 6: Final answer
    x = 121,306.97

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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.