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Finding the Fourth Proportional to 142.02, 195.92 and 83.77

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Solution

The fourth proportional to 142.02, 195.92 and 83.77 is: 115.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.02 : 195.92 = 83.77 : x
  2. Step 2: Convert to fraction form
    142.02/195.92 = 83.77/x
  3. Step 3: Cross multiply
    142.02x = 195.92 × 83.77
  4. Step 4: Simplify right side
    142.02x = 16,411.62
  5. Step 5: Solve for x
    x = 16,411.62/142.02
  6. Step 6: Final answer
    x = 115.56

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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.