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Finding the Fourth Proportional to 125.79, 188.65 and 40.29

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Solution

The fourth proportional to 125.79, 188.65 and 40.29 is: 60.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.79 : 188.65 = 40.29 : x
  2. Step 2: Convert to fraction form
    125.79/188.65 = 40.29/x
  3. Step 3: Cross multiply
    125.79x = 188.65 × 40.29
  4. Step 4: Simplify right side
    125.79x = 7,599.56
  5. Step 5: Solve for x
    x = 7,599.56/125.79
  6. Step 6: Final answer
    x = 60.42

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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.