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Finding the Fourth Proportional to 124.15, 186.15 and 69.97

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Solution

The fourth proportional to 124.15, 186.15 and 69.97 is: 104.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.15 : 186.15 = 69.97 : x
  2. Step 2: Convert to fraction form
    124.15/186.15 = 69.97/x
  3. Step 3: Cross multiply
    124.15x = 186.15 × 69.97
  4. Step 4: Simplify right side
    124.15x = 13,024.92
  5. Step 5: Solve for x
    x = 13,024.92/124.15
  6. Step 6: Final answer
    x = 104.91

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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.