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Finding the Fourth Proportional to 176.23, 243.26 and 138.88

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Solution

The fourth proportional to 176.23, 243.26 and 138.88 is: 191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.23 : 243.26 = 138.88 : x
  2. Step 2: Convert to fraction form
    176.23/243.26 = 138.88/x
  3. Step 3: Cross multiply
    176.23x = 243.26 × 138.88
  4. Step 4: Simplify right side
    176.23x = 33,783.95
  5. Step 5: Solve for x
    x = 33,783.95/176.23
  6. Step 6: Final answer
    x = 191.70

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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.