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Finding the Fourth Proportional to 129.74, 193.57 and 117.59

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Solution

The fourth proportional to 129.74, 193.57 and 117.59 is: 175.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.74 : 193.57 = 117.59 : x
  2. Step 2: Convert to fraction form
    129.74/193.57 = 117.59/x
  3. Step 3: Cross multiply
    129.74x = 193.57 × 117.59
  4. Step 4: Simplify right side
    129.74x = 22,760.63
  5. Step 5: Solve for x
    x = 22,760.63/129.74
  6. Step 6: Final answer
    x = 175.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.