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Finding the Fourth Proportional to 132,665.80, 198,998.70 and 80,048.20

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Solution

The fourth proportional to 132,665.80, 198,998.70 and 80,048.20 is: 120,072.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,665.80 : 198,998.70 = 80,048.20 : x
  2. Step 2: Convert to fraction form
    132,665.80/198,998.70 = 80,048.20/x
  3. Step 3: Cross multiply
    132,665.80x = 198,998.70 × 80,048.20
  4. Step 4: Simplify right side
    132,665.80x = 15,929,487,737.34
  5. Step 5: Solve for x
    x = 15,929,487,737.34/132,665.80
  6. Step 6: Final answer
    x = 120,072.30

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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.