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Finding the Fourth Proportional to 178.34, 245.91 and 122.95

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Solution

The fourth proportional to 178.34, 245.91 and 122.95 is: 169.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.34 : 245.91 = 122.95 : x
  2. Step 2: Convert to fraction form
    178.34/245.91 = 122.95/x
  3. Step 3: Cross multiply
    178.34x = 245.91 × 122.95
  4. Step 4: Simplify right side
    178.34x = 30,235.06
  5. Step 5: Solve for x
    x = 30,235.06/178.34
  6. Step 6: Final answer
    x = 169.54

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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.