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Finding the Fourth Proportional to 126.87, 191.35 and 125.51

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Solution

The fourth proportional to 126.87, 191.35 and 125.51 is: 189.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.87 : 191.35 = 125.51 : x
  2. Step 2: Convert to fraction form
    126.87/191.35 = 125.51/x
  3. Step 3: Cross multiply
    126.87x = 191.35 × 125.51
  4. Step 4: Simplify right side
    126.87x = 24,015.07
  5. Step 5: Solve for x
    x = 24,015.07/126.87
  6. Step 6: Final answer
    x = 189.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.