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Finding the Fourth Proportional to 135.39, 202.11 and 125.90

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Solution

The fourth proportional to 135.39, 202.11 and 125.90 is: 187.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.39 : 202.11 = 125.90 : x
  2. Step 2: Convert to fraction form
    135.39/202.11 = 125.90/x
  3. Step 3: Cross multiply
    135.39x = 202.11 × 125.90
  4. Step 4: Simplify right side
    135.39x = 25,444.92
  5. Step 5: Solve for x
    x = 25,444.92/135.39
  6. Step 6: Final answer
    x = 187.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.