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Finding the Fourth Proportional to 142.85, 197.00 and 127.46

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Solution

The fourth proportional to 142.85, 197.00 and 127.46 is: 175.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.85 : 197.00 = 127.46 : x
  2. Step 2: Convert to fraction form
    142.85/197.00 = 127.46/x
  3. Step 3: Cross multiply
    142.85x = 197.00 × 127.46
  4. Step 4: Simplify right side
    142.85x = 25,109.95
  5. Step 5: Solve for x
    x = 25,109.95/142.85
  6. Step 6: Final answer
    x = 175.78

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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.