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Finding the Fourth Proportional to 132,616.66, 198,966.50 and 85,285.20

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Solution

The fourth proportional to 132,616.66, 198,966.50 and 85,285.20 is: 127,954.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,616.66 : 198,966.50 = 85,285.20 : x
  2. Step 2: Convert to fraction form
    132,616.66/198,966.50 = 85,285.20/x
  3. Step 3: Cross multiply
    132,616.66x = 198,966.50 × 85,285.20
  4. Step 4: Simplify right side
    132,616.66x = 16,968,897,745.80
  5. Step 5: Solve for x
    x = 16,968,897,745.80/132,616.66
  6. Step 6: Final answer
    x = 127,954.49

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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.