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Finding the Fourth Proportional to 90,982.80, 136,474.20 and 82,672.20

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Solution

The fourth proportional to 90,982.80, 136,474.20 and 82,672.20 is: 124,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,982.80 : 136,474.20 = 82,672.20 : x
  2. Step 2: Convert to fraction form
    90,982.80/136,474.20 = 82,672.20/x
  3. Step 3: Cross multiply
    90,982.80x = 136,474.20 × 82,672.20
  4. Step 4: Simplify right side
    90,982.80x = 11,282,622,357.24
  5. Step 5: Solve for x
    x = 11,282,622,357.24/90,982.80
  6. Step 6: Final answer
    x = 124,008.30

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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.