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Finding the Fourth Proportional to 82.95, 124.35 and 28.83

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Solution

The fourth proportional to 82.95, 124.35 and 28.83 is: 43.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.95 : 124.35 = 28.83 : x
  2. Step 2: Convert to fraction form
    82.95/124.35 = 28.83/x
  3. Step 3: Cross multiply
    82.95x = 124.35 × 28.83
  4. Step 4: Simplify right side
    82.95x = 3,584.90
  5. Step 5: Solve for x
    x = 3,584.90/82.95
  6. Step 6: Final answer
    x = 43.22

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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.