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Finding the Fourth Proportional to 120,090.71, 179,990.40 and 88,205.11

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Solution

The fourth proportional to 120,090.71, 179,990.40 and 88,205.11 is: 132,200.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,090.71 : 179,990.40 = 88,205.11 : x
  2. Step 2: Convert to fraction form
    120,090.71/179,990.40 = 88,205.11/x
  3. Step 3: Cross multiply
    120,090.71x = 179,990.40 × 88,205.11
  4. Step 4: Simplify right side
    120,090.71x = 15,876,073,586.70
  5. Step 5: Solve for x
    x = 15,876,073,586.70/120,090.71
  6. Step 6: Final answer
    x = 132,200.69

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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.