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Finding the Fourth Proportional to 147.07, 202.98 and 102.79

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Solution

The fourth proportional to 147.07, 202.98 and 102.79 is: 141.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.07 : 202.98 = 102.79 : x
  2. Step 2: Convert to fraction form
    147.07/202.98 = 102.79/x
  3. Step 3: Cross multiply
    147.07x = 202.98 × 102.79
  4. Step 4: Simplify right side
    147.07x = 20,863.30
  5. Step 5: Solve for x
    x = 20,863.30/147.07
  6. Step 6: Final answer
    x = 141.86

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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.