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Finding the Fourth Proportional to 142.89, 197.05 and 124.43

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Solution

The fourth proportional to 142.89, 197.05 and 124.43 is: 171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.89 : 197.05 = 124.43 : x
  2. Step 2: Convert to fraction form
    142.89/197.05 = 124.43/x
  3. Step 3: Cross multiply
    142.89x = 197.05 × 124.43
  4. Step 4: Simplify right side
    142.89x = 24,518.31
  5. Step 5: Solve for x
    x = 24,518.31/142.89
  6. Step 6: Final answer
    x = 171.59

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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.