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Finding the Fourth Proportional to 132,139.80, 198,169.20 and 43,372.80

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Solution

The fourth proportional to 132,139.80, 198,169.20 and 43,372.80 is: 65,045.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,139.80 : 198,169.20 = 43,372.80 : x
  2. Step 2: Convert to fraction form
    132,139.80/198,169.20 = 43,372.80/x
  3. Step 3: Cross multiply
    132,139.80x = 198,169.20 × 43,372.80
  4. Step 4: Simplify right side
    132,139.80x = 8,595,153,077.76
  5. Step 5: Solve for x
    x = 8,595,153,077.76/132,139.80
  6. Step 6: Final answer
    x = 65,045.91

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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.