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Finding the Fourth Proportional to 125.35, 188.12 and 84.85

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Solution

The fourth proportional to 125.35, 188.12 and 84.85 is: 127.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.35 : 188.12 = 84.85 : x
  2. Step 2: Convert to fraction form
    125.35/188.12 = 84.85/x
  3. Step 3: Cross multiply
    125.35x = 188.12 × 84.85
  4. Step 4: Simplify right side
    125.35x = 15,961.72
  5. Step 5: Solve for x
    x = 15,961.72/125.35
  6. Step 6: Final answer
    x = 127.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.