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Finding the Fourth Proportional to 90,503.68, 135,501.72 and 68,247.04

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Solution

The fourth proportional to 90,503.68, 135,501.72 and 68,247.04 is: 102,179.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,503.68 : 135,501.72 = 68,247.04 : x
  2. Step 2: Convert to fraction form
    90,503.68/135,501.72 = 68,247.04/x
  3. Step 3: Cross multiply
    90,503.68x = 135,501.72 × 68,247.04
  4. Step 4: Simplify right side
    90,503.68x = 9,247,591,304.91
  5. Step 5: Solve for x
    x = 9,247,591,304.91/90,503.68
  6. Step 6: Final answer
    x = 102,179.17

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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.