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Finding the Fourth Proportional to 218.20, 301.10 and 124.93

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Solution

The fourth proportional to 218.20, 301.10 and 124.93 is: 172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.20 : 301.10 = 124.93 : x
  2. Step 2: Convert to fraction form
    218.20/301.10 = 124.93/x
  3. Step 3: Cross multiply
    218.20x = 301.10 × 124.93
  4. Step 4: Simplify right side
    218.20x = 37,616.42
  5. Step 5: Solve for x
    x = 37,616.42/218.20
  6. Step 6: Final answer
    x = 172.39

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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.