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Finding the Fourth Proportional to 91,609.20, 137,413.80 and 82,423.80

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Solution

The fourth proportional to 91,609.20, 137,413.80 and 82,423.80 is: 123,635.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,609.20 : 137,413.80 = 82,423.80 : x
  2. Step 2: Convert to fraction form
    91,609.20/137,413.80 = 82,423.80/x
  3. Step 3: Cross multiply
    91,609.20x = 137,413.80 × 82,423.80
  4. Step 4: Simplify right side
    91,609.20x = 11,326,167,568.44
  5. Step 5: Solve for x
    x = 11,326,167,568.44/91,609.20
  6. Step 6: Final answer
    x = 123,635.70

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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.