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Finding the Fourth Proportional to 82.80, 124.20 and 62.48

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Solution

The fourth proportional to 82.80, 124.20 and 62.48 is: 93.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.80 : 124.20 = 62.48 : x
  2. Step 2: Convert to fraction form
    82.80/124.20 = 62.48/x
  3. Step 3: Cross multiply
    82.80x = 124.20 × 62.48
  4. Step 4: Simplify right side
    82.80x = 7,760.02
  5. Step 5: Solve for x
    x = 7,760.02/82.80
  6. Step 6: Final answer
    x = 93.72

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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.