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Finding the Fourth Proportional to 125.15, 170.30 and 124.54

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Solution

The fourth proportional to 125.15, 170.30 and 124.54 is: 169.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.15 : 170.30 = 124.54 : x
  2. Step 2: Convert to fraction form
    125.15/170.30 = 124.54/x
  3. Step 3: Cross multiply
    125.15x = 170.30 × 124.54
  4. Step 4: Simplify right side
    125.15x = 21,209.05
  5. Step 5: Solve for x
    x = 21,209.05/125.15
  6. Step 6: Final answer
    x = 169.48

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.