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Finding the Fourth Proportional to 90,658.80, 135,849.60 and 60,966.72

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Solution

The fourth proportional to 90,658.80, 135,849.60 and 60,966.72 is: 91,356.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,658.80 : 135,849.60 = 60,966.72 : x
  2. Step 2: Convert to fraction form
    90,658.80/135,849.60 = 60,966.72/x
  3. Step 3: Cross multiply
    90,658.80x = 135,849.60 × 60,966.72
  4. Step 4: Simplify right side
    90,658.80x = 8,282,304,525.31
  5. Step 5: Solve for x
    x = 8,282,304,525.31/90,658.80
  6. Step 6: Final answer
    x = 91,356.87

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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.