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Finding the Fourth Proportional to 99,689.97, 149,597.20 and 66,433.37

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Solution

The fourth proportional to 99,689.97, 149,597.20 and 66,433.37 is: 99,691.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,689.97 : 149,597.20 = 66,433.37 : x
  2. Step 2: Convert to fraction form
    99,689.97/149,597.20 = 66,433.37/x
  3. Step 3: Cross multiply
    99,689.97x = 149,597.20 × 66,433.37
  4. Step 4: Simplify right side
    99,689.97x = 9,938,246,138.56
  5. Step 5: Solve for x
    x = 9,938,246,138.56/99,689.97
  6. Step 6: Final answer
    x = 99,691.54

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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.