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Finding the Fourth Proportional to 124.28, 186.43 and 43.13

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Solution

The fourth proportional to 124.28, 186.43 and 43.13 is: 64.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.28 : 186.43 = 43.13 : x
  2. Step 2: Convert to fraction form
    124.28/186.43 = 43.13/x
  3. Step 3: Cross multiply
    124.28x = 186.43 × 43.13
  4. Step 4: Simplify right side
    124.28x = 8,040.73
  5. Step 5: Solve for x
    x = 8,040.73/124.28
  6. Step 6: Final answer
    x = 64.70

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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.