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Finding the Fourth Proportional to 129.14, 177.40 and 104.48

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Solution

The fourth proportional to 129.14, 177.40 and 104.48 is: 143.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.14 : 177.40 = 104.48 : x
  2. Step 2: Convert to fraction form
    129.14/177.40 = 104.48/x
  3. Step 3: Cross multiply
    129.14x = 177.40 × 104.48
  4. Step 4: Simplify right side
    129.14x = 18,534.75
  5. Step 5: Solve for x
    x = 18,534.75/129.14
  6. Step 6: Final answer
    x = 143.52

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.