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Finding the Fourth Proportional to 177.50, 244.71 and 122.15

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Solution

The fourth proportional to 177.50, 244.71 and 122.15 is: 168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.50 : 244.71 = 122.15 : x
  2. Step 2: Convert to fraction form
    177.50/244.71 = 122.15/x
  3. Step 3: Cross multiply
    177.50x = 244.71 × 122.15
  4. Step 4: Simplify right side
    177.50x = 29,890.10
  5. Step 5: Solve for x
    x = 29,890.10/177.50
  6. Step 6: Final answer
    x = 168.40

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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.