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Finding the Fourth Proportional to 125.15, 170.51 and 124.74

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Solution

The fourth proportional to 125.15, 170.51 and 124.74 is: 169.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.15 : 170.51 = 124.74 : x
  2. Step 2: Convert to fraction form
    125.15/170.51 = 124.74/x
  3. Step 3: Cross multiply
    125.15x = 170.51 × 124.74
  4. Step 4: Simplify right side
    125.15x = 21,268.79
  5. Step 5: Solve for x
    x = 21,268.79/125.15
  6. Step 6: Final answer
    x = 169.95

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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.