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Finding the Fourth Proportional to 80,510.40, 120,765.60 and 49,363.20

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Solution

The fourth proportional to 80,510.40, 120,765.60 and 49,363.20 is: 74,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,510.40 : 120,765.60 = 49,363.20 : x
  2. Step 2: Convert to fraction form
    80,510.40/120,765.60 = 49,363.20/x
  3. Step 3: Cross multiply
    80,510.40x = 120,765.60 × 49,363.20
  4. Step 4: Simplify right side
    80,510.40x = 5,961,376,465.92
  5. Step 5: Solve for x
    x = 5,961,376,465.92/80,510.40
  6. Step 6: Final answer
    x = 74,044.80

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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.