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Finding the Fourth Proportional to 132,969.72, 198,675.85 and 128,318.70

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Solution

The fourth proportional to 132,969.72, 198,675.85 and 128,318.70 is: 191,726.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,969.72 : 198,675.85 = 128,318.70 : x
  2. Step 2: Convert to fraction form
    132,969.72/198,675.85 = 128,318.70/x
  3. Step 3: Cross multiply
    132,969.72x = 198,675.85 × 128,318.70
  4. Step 4: Simplify right side
    132,969.72x = 25,493,826,793.40
  5. Step 5: Solve for x
    x = 25,493,826,793.40/132,969.72
  6. Step 6: Final answer
    x = 191,726.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.