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Finding the Fourth Proportional to 80,137.80, 120,060.90 and 65,266.20

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Solution

The fourth proportional to 80,137.80, 120,060.90 and 65,266.20 is: 97,780.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,137.80 : 120,060.90 = 65,266.20 : x
  2. Step 2: Convert to fraction form
    80,137.80/120,060.90 = 65,266.20/x
  3. Step 3: Cross multiply
    80,137.80x = 120,060.90 × 65,266.20
  4. Step 4: Simplify right side
    80,137.80x = 7,835,918,711.58
  5. Step 5: Solve for x
    x = 7,835,918,711.58/80,137.80
  6. Step 6: Final answer
    x = 97,780.56

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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.