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Finding the Fourth Proportional to 148.08, 204.39 and 101.40

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Solution

The fourth proportional to 148.08, 204.39 and 101.40 is: 139.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.08 : 204.39 = 101.40 : x
  2. Step 2: Convert to fraction form
    148.08/204.39 = 101.40/x
  3. Step 3: Cross multiply
    148.08x = 204.39 × 101.40
  4. Step 4: Simplify right side
    148.08x = 20,725.15
  5. Step 5: Solve for x
    x = 20,725.15/148.08
  6. Step 6: Final answer
    x = 139.96

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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.