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Finding the Fourth Proportional to 125.36, 188.18 and 99.85

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Solution

The fourth proportional to 125.36, 188.18 and 99.85 is: 149.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.36 : 188.18 = 99.85 : x
  2. Step 2: Convert to fraction form
    125.36/188.18 = 99.85/x
  3. Step 3: Cross multiply
    125.36x = 188.18 × 99.85
  4. Step 4: Simplify right side
    125.36x = 18,789.77
  5. Step 5: Solve for x
    x = 18,789.77/125.36
  6. Step 6: Final answer
    x = 149.89

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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.