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Finding the Fourth Proportional to 71,352.10, 106,912.95 and 45,009.70

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Solution

The fourth proportional to 71,352.10, 106,912.95 and 45,009.70 is: 67,441.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,352.10 : 106,912.95 = 45,009.70 : x
  2. Step 2: Convert to fraction form
    71,352.10/106,912.95 = 45,009.70/x
  3. Step 3: Cross multiply
    71,352.10x = 106,912.95 × 45,009.70
  4. Step 4: Simplify right side
    71,352.10x = 4,812,119,805.62
  5. Step 5: Solve for x
    x = 4,812,119,805.62/71,352.10
  6. Step 6: Final answer
    x = 67,441.88

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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.