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Finding the Fourth Proportional to 141.33, 210.72 and 125.85

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Solution

The fourth proportional to 141.33, 210.72 and 125.85 is: 187.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.33 : 210.72 = 125.85 : x
  2. Step 2: Convert to fraction form
    141.33/210.72 = 125.85/x
  3. Step 3: Cross multiply
    141.33x = 210.72 × 125.85
  4. Step 4: Simplify right side
    141.33x = 26,519.11
  5. Step 5: Solve for x
    x = 26,519.11/141.33
  6. Step 6: Final answer
    x = 187.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.