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Finding the Fourth Proportional to 125.91, 188.82 and 68.13

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Solution

The fourth proportional to 125.91, 188.82 and 68.13 is: 102.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.91 : 188.82 = 68.13 : x
  2. Step 2: Convert to fraction form
    125.91/188.82 = 68.13/x
  3. Step 3: Cross multiply
    125.91x = 188.82 × 68.13
  4. Step 4: Simplify right side
    125.91x = 12,864.31
  5. Step 5: Solve for x
    x = 12,864.31/125.91
  6. Step 6: Final answer
    x = 102.17

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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.