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Finding the Fourth Proportional to 129.08, 194.43 and 118.01

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Solution

The fourth proportional to 129.08, 194.43 and 118.01 is: 177.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.08 : 194.43 = 118.01 : x
  2. Step 2: Convert to fraction form
    129.08/194.43 = 118.01/x
  3. Step 3: Cross multiply
    129.08x = 194.43 × 118.01
  4. Step 4: Simplify right side
    129.08x = 22,943.71
  5. Step 5: Solve for x
    x = 22,943.71/129.08
  6. Step 6: Final answer
    x = 177.75

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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.