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Finding the Fourth Proportional to 80,687.20, 121,030.80 and 62,003.20

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Solution

The fourth proportional to 80,687.20, 121,030.80 and 62,003.20 is: 93,004.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,687.20 : 121,030.80 = 62,003.20 : x
  2. Step 2: Convert to fraction form
    80,687.20/121,030.80 = 62,003.20/x
  3. Step 3: Cross multiply
    80,687.20x = 121,030.80 × 62,003.20
  4. Step 4: Simplify right side
    80,687.20x = 7,504,296,898.56
  5. Step 5: Solve for x
    x = 7,504,296,898.56/80,687.20
  6. Step 6: Final answer
    x = 93,004.80

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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.