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Finding the Fourth Proportional to 176.21, 243.21 and 102.57

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Solution

The fourth proportional to 176.21, 243.21 and 102.57 is: 141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.21 : 243.21 = 102.57 : x
  2. Step 2: Convert to fraction form
    176.21/243.21 = 102.57/x
  3. Step 3: Cross multiply
    176.21x = 243.21 × 102.57
  4. Step 4: Simplify right side
    176.21x = 24,944.95
  5. Step 5: Solve for x
    x = 24,944.95/176.21
  6. Step 6: Final answer
    x = 141.56

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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.