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Finding the Fourth Proportional to 135.90, 188.55 and 125.10

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Solution

The fourth proportional to 135.90, 188.55 and 125.10 is: 173.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.90 : 188.55 = 125.10 : x
  2. Step 2: Convert to fraction form
    135.90/188.55 = 125.10/x
  3. Step 3: Cross multiply
    135.90x = 188.55 × 125.10
  4. Step 4: Simplify right side
    135.90x = 23,587.61
  5. Step 5: Solve for x
    x = 23,587.61/135.90
  6. Step 6: Final answer
    x = 173.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.