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Finding the Fourth Proportional to 74,591.60, 111,887.68 and 30,219.20

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Solution

The fourth proportional to 74,591.60, 111,887.68 and 30,219.20 is: 45,328.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,591.60 : 111,887.68 = 30,219.20 : x
  2. Step 2: Convert to fraction form
    74,591.60/111,887.68 = 30,219.20/x
  3. Step 3: Cross multiply
    74,591.60x = 111,887.68 × 30,219.20
  4. Step 4: Simplify right side
    74,591.60x = 3,381,156,179.46
  5. Step 5: Solve for x
    x = 3,381,156,179.46/74,591.60
  6. Step 6: Final answer
    x = 45,328.91

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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.