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Finding the Fourth Proportional to 129.03, 177.71 and 118.23

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Solution

The fourth proportional to 129.03, 177.71 and 118.23 is: 162.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.03 : 177.71 = 118.23 : x
  2. Step 2: Convert to fraction form
    129.03/177.71 = 118.23/x
  3. Step 3: Cross multiply
    129.03x = 177.71 × 118.23
  4. Step 4: Simplify right side
    129.03x = 21,010.06
  5. Step 5: Solve for x
    x = 21,010.06/129.03
  6. Step 6: Final answer
    x = 162.83

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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.