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Finding the Fourth Proportional to 178.29, 245.93 and 131.78

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Solution

The fourth proportional to 178.29, 245.93 and 131.78 is: 181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.29 : 245.93 = 131.78 : x
  2. Step 2: Convert to fraction form
    178.29/245.93 = 131.78/x
  3. Step 3: Cross multiply
    178.29x = 245.93 × 131.78
  4. Step 4: Simplify right side
    178.29x = 32,408.66
  5. Step 5: Solve for x
    x = 32,408.66/178.29
  6. Step 6: Final answer
    x = 181.77

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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.