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Finding the Fourth Proportional to 147.20, 202.52 and 143.15

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Solution

The fourth proportional to 147.20, 202.52 and 143.15 is: 196.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.20 : 202.52 = 143.15 : x
  2. Step 2: Convert to fraction form
    147.20/202.52 = 143.15/x
  3. Step 3: Cross multiply
    147.20x = 202.52 × 143.15
  4. Step 4: Simplify right side
    147.20x = 28,990.02
  5. Step 5: Solve for x
    x = 28,990.02/147.20
  6. Step 6: Final answer
    x = 196.94

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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.