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Finding the Fourth Proportional to 99,672.60, 149,217.30 and 66,430.20

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Solution

The fourth proportional to 99,672.60, 149,217.30 and 66,430.20 is: 99,450.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,672.60 : 149,217.30 = 66,430.20 : x
  2. Step 2: Convert to fraction form
    99,672.60/149,217.30 = 66,430.20/x
  3. Step 3: Cross multiply
    99,672.60x = 149,217.30 × 66,430.20
  4. Step 4: Simplify right side
    99,672.60x = 9,912,535,082.46
  5. Step 5: Solve for x
    x = 9,912,535,082.46/99,672.60
  6. Step 6: Final answer
    x = 99,450.95

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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.