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Finding the Fourth Proportional to 147.96, 204.18 and 101.28

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Solution

The fourth proportional to 147.96, 204.18 and 101.28 is: 139.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.96 : 204.18 = 101.28 : x
  2. Step 2: Convert to fraction form
    147.96/204.18 = 101.28/x
  3. Step 3: Cross multiply
    147.96x = 204.18 × 101.28
  4. Step 4: Simplify right side
    147.96x = 20,679.35
  5. Step 5: Solve for x
    x = 20,679.35/147.96
  6. Step 6: Final answer
    x = 139.76

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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.