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Finding the Fourth Proportional to 159,658.56, 220,319.19 and 91,660.68

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Solution

The fourth proportional to 159,658.56, 220,319.19 and 91,660.68 is: 126,486.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,658.56 : 220,319.19 = 91,660.68 : x
  2. Step 2: Convert to fraction form
    159,658.56/220,319.19 = 91,660.68/x
  3. Step 3: Cross multiply
    159,658.56x = 220,319.19 × 91,660.68
  4. Step 4: Simplify right side
    159,658.56x = 20,194,606,772.45
  5. Step 5: Solve for x
    x = 20,194,606,772.45/159,658.56
  6. Step 6: Final answer
    x = 126,486.21

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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.