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Finding the Fourth Proportional to 91,247.87, 136,884.90 and 28,073.30

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Solution

The fourth proportional to 91,247.87, 136,884.90 and 28,073.30 is: 42,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,247.87 : 136,884.90 = 28,073.30 : x
  2. Step 2: Convert to fraction form
    91,247.87/136,884.90 = 28,073.30/x
  3. Step 3: Cross multiply
    91,247.87x = 136,884.90 × 28,073.30
  4. Step 4: Simplify right side
    91,247.87x = 3,842,810,126.11
  5. Step 5: Solve for x
    x = 3,842,810,126.11/91,247.87
  6. Step 6: Final answer
    x = 42,113.97

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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.