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Finding the Fourth Proportional to 142.10, 195.67 and 125.70

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Solution

The fourth proportional to 142.10, 195.67 and 125.70 is: 173.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.10 : 195.67 = 125.70 : x
  2. Step 2: Convert to fraction form
    142.10/195.67 = 125.70/x
  3. Step 3: Cross multiply
    142.10x = 195.67 × 125.70
  4. Step 4: Simplify right side
    142.10x = 24,595.54
  5. Step 5: Solve for x
    x = 24,595.54/142.10
  6. Step 6: Final answer
    x = 173.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.