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Finding the Fourth Proportional to 132,079.20, 198,118.80 and 108,751.20

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Solution

The fourth proportional to 132,079.20, 198,118.80 and 108,751.20 is: 163,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,079.20 : 198,118.80 = 108,751.20 : x
  2. Step 2: Convert to fraction form
    132,079.20/198,118.80 = 108,751.20/x
  3. Step 3: Cross multiply
    132,079.20x = 198,118.80 × 108,751.20
  4. Step 4: Simplify right side
    132,079.20x = 21,545,657,242.56
  5. Step 5: Solve for x
    x = 21,545,657,242.56/132,079.20
  6. Step 6: Final answer
    x = 163,126.80

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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.