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Finding the Fourth Proportional to 80,359.40, 120,668.70 and 60,660.20

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Solution

The fourth proportional to 80,359.40, 120,668.70 and 60,660.20 is: 91,088.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,359.40 : 120,668.70 = 60,660.20 : x
  2. Step 2: Convert to fraction form
    80,359.40/120,668.70 = 60,660.20/x
  3. Step 3: Cross multiply
    80,359.40x = 120,668.70 × 60,660.20
  4. Step 4: Simplify right side
    80,359.40x = 7,319,787,475.74
  5. Step 5: Solve for x
    x = 7,319,787,475.74/80,359.40
  6. Step 6: Final answer
    x = 91,088.13

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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.