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Finding the Fourth Proportional to 148.05, 204.12 and 129.60

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Solution

The fourth proportional to 148.05, 204.12 and 129.60 is: 178.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.05 : 204.12 = 129.60 : x
  2. Step 2: Convert to fraction form
    148.05/204.12 = 129.60/x
  3. Step 3: Cross multiply
    148.05x = 204.12 × 129.60
  4. Step 4: Simplify right side
    148.05x = 26,453.95
  5. Step 5: Solve for x
    x = 26,453.95/148.05
  6. Step 6: Final answer
    x = 178.68

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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.