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Finding the Fourth Proportional to 172.79, 258.76 and 118.52

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Solution

The fourth proportional to 172.79, 258.76 and 118.52 is: 177.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.79 : 258.76 = 118.52 : x
  2. Step 2: Convert to fraction form
    172.79/258.76 = 118.52/x
  3. Step 3: Cross multiply
    172.79x = 258.76 × 118.52
  4. Step 4: Simplify right side
    172.79x = 30,668.24
  5. Step 5: Solve for x
    x = 30,668.24/172.79
  6. Step 6: Final answer
    x = 177.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.