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Finding the Fourth Proportional to 132.48, 200.40 and 129.60

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Solution

The fourth proportional to 132.48, 200.40 and 129.60 is: 196.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.48 : 200.40 = 129.60 : x
  2. Step 2: Convert to fraction form
    132.48/200.40 = 129.60/x
  3. Step 3: Cross multiply
    132.48x = 200.40 × 129.60
  4. Step 4: Simplify right side
    132.48x = 25,971.84
  5. Step 5: Solve for x
    x = 25,971.84/132.48
  6. Step 6: Final answer
    x = 196.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.