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Finding the Fourth Proportional to 91,874.70, 137,739.15 and 50,321.70

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Solution

The fourth proportional to 91,874.70, 137,739.15 and 50,321.70 is: 75,442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,874.70 : 137,739.15 = 50,321.70 : x
  2. Step 2: Convert to fraction form
    91,874.70/137,739.15 = 50,321.70/x
  3. Step 3: Cross multiply
    91,874.70x = 137,739.15 × 50,321.70
  4. Step 4: Simplify right side
    91,874.70x = 6,931,268,184.56
  5. Step 5: Solve for x
    x = 6,931,268,184.56/91,874.70
  6. Step 6: Final answer
    x = 75,442.62

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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.