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Finding the Fourth Proportional to 147.93, 202.85 and 142.78

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Solution

The fourth proportional to 147.93, 202.85 and 142.78 is: 195.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.93 : 202.85 = 142.78 : x
  2. Step 2: Convert to fraction form
    147.93/202.85 = 142.78/x
  3. Step 3: Cross multiply
    147.93x = 202.85 × 142.78
  4. Step 4: Simplify right side
    147.93x = 28,962.92
  5. Step 5: Solve for x
    x = 28,962.92/147.93
  6. Step 6: Final answer
    x = 195.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.