Home / 80,802.20-121,073.70-76,136.60

Finding the Fourth Proportional to 80,802.20, 121,073.70 and 76,136.60

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Solution

The fourth proportional to 80,802.20, 121,073.70 and 76,136.60 is: 114,082.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,802.20 : 121,073.70 = 76,136.60 : x
  2. Step 2: Convert to fraction form
    80,802.20/121,073.70 = 76,136.60/x
  3. Step 3: Cross multiply
    80,802.20x = 121,073.70 × 76,136.60
  4. Step 4: Simplify right side
    80,802.20x = 9,218,139,867.42
  5. Step 5: Solve for x
    x = 9,218,139,867.42/80,802.20
  6. Step 6: Final answer
    x = 114,082.78

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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.