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Finding the Fourth Proportional to 82.77, 124.12 and 28.63

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Solution

The fourth proportional to 82.77, 124.12 and 28.63 is: 42.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.77 : 124.12 = 28.63 : x
  2. Step 2: Convert to fraction form
    82.77/124.12 = 28.63/x
  3. Step 3: Cross multiply
    82.77x = 124.12 × 28.63
  4. Step 4: Simplify right side
    82.77x = 3,553.56
  5. Step 5: Solve for x
    x = 3,553.56/82.77
  6. Step 6: Final answer
    x = 42.93

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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.