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Finding the Fourth Proportional to 91,379.75, 137,069.62 and 60,207.71

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Solution

The fourth proportional to 91,379.75, 137,069.62 and 60,207.71 is: 90,311.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,379.75 : 137,069.62 = 60,207.71 : x
  2. Step 2: Convert to fraction form
    91,379.75/137,069.62 = 60,207.71/x
  3. Step 3: Cross multiply
    91,379.75x = 137,069.62 × 60,207.71
  4. Step 4: Simplify right side
    91,379.75x = 8,252,647,094.90
  5. Step 5: Solve for x
    x = 8,252,647,094.90/91,379.75
  6. Step 6: Final answer
    x = 90,311.56

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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.