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Finding the Fourth Proportional to 149.04, 205.56 and 129.36

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Solution

The fourth proportional to 149.04, 205.56 and 129.36 is: 178.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.04 : 205.56 = 129.36 : x
  2. Step 2: Convert to fraction form
    149.04/205.56 = 129.36/x
  3. Step 3: Cross multiply
    149.04x = 205.56 × 129.36
  4. Step 4: Simplify right side
    149.04x = 26,591.24
  5. Step 5: Solve for x
    x = 26,591.24/149.04
  6. Step 6: Final answer
    x = 178.42

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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.