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Finding the Fourth Proportional to 147.13, 202.84 and 103.39

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Solution

The fourth proportional to 147.13, 202.84 and 103.39 is: 142.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.13 : 202.84 = 103.39 : x
  2. Step 2: Convert to fraction form
    147.13/202.84 = 103.39/x
  3. Step 3: Cross multiply
    147.13x = 202.84 × 103.39
  4. Step 4: Simplify right side
    147.13x = 20,970.86
  5. Step 5: Solve for x
    x = 20,970.86/147.13
  6. Step 6: Final answer
    x = 142.54

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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.