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Finding the Fourth Proportional to 142.07, 195.91 and 97.85

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Solution

The fourth proportional to 142.07, 195.91 and 97.85 is: 134.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.07 : 195.91 = 97.85 : x
  2. Step 2: Convert to fraction form
    142.07/195.91 = 97.85/x
  3. Step 3: Cross multiply
    142.07x = 195.91 × 97.85
  4. Step 4: Simplify right side
    142.07x = 19,169.79
  5. Step 5: Solve for x
    x = 19,169.79/142.07
  6. Step 6: Final answer
    x = 134.93

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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.