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Finding the Fourth Proportional to 177.40, 244.86 and 138.76

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Solution

The fourth proportional to 177.40, 244.86 and 138.76 is: 191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.40 : 244.86 = 138.76 : x
  2. Step 2: Convert to fraction form
    177.40/244.86 = 138.76/x
  3. Step 3: Cross multiply
    177.40x = 244.86 × 138.76
  4. Step 4: Simplify right side
    177.40x = 33,976.77
  5. Step 5: Solve for x
    x = 33,976.77/177.40
  6. Step 6: Final answer
    x = 191.53

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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.