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Finding the Fourth Proportional to 132,472.30, 198,190.05 and 85,816.30

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Solution

The fourth proportional to 132,472.30, 198,190.05 and 85,816.30 is: 128,388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,472.30 : 198,190.05 = 85,816.30 : x
  2. Step 2: Convert to fraction form
    132,472.30/198,190.05 = 85,816.30/x
  3. Step 3: Cross multiply
    132,472.30x = 198,190.05 × 85,816.30
  4. Step 4: Simplify right side
    132,472.30x = 17,007,936,787.82
  5. Step 5: Solve for x
    x = 17,007,936,787.82/132,472.30
  6. Step 6: Final answer
    x = 128,388.63

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1.5x scale

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.