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Finding the Fourth Proportional to 129.01, 194.21 and 88.69

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Solution

The fourth proportional to 129.01, 194.21 and 88.69 is: 133.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.01 : 194.21 = 88.69 : x
  2. Step 2: Convert to fraction form
    129.01/194.21 = 88.69/x
  3. Step 3: Cross multiply
    129.01x = 194.21 × 88.69
  4. Step 4: Simplify right side
    129.01x = 17,224.48
  5. Step 5: Solve for x
    x = 17,224.48/129.01
  6. Step 6: Final answer
    x = 133.51

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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.