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Finding the Fourth Proportional to 124.30, 171.49 and 75.19

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Solution

The fourth proportional to 124.30, 171.49 and 75.19 is: 103.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.30 : 171.49 = 75.19 : x
  2. Step 2: Convert to fraction form
    124.30/171.49 = 75.19/x
  3. Step 3: Cross multiply
    124.30x = 171.49 × 75.19
  4. Step 4: Simplify right side
    124.30x = 12,894.33
  5. Step 5: Solve for x
    x = 12,894.33/124.30
  6. Step 6: Final answer
    x = 103.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.