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Finding the Fourth Proportional to 178.39, 245.90 and 131.62

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Solution

The fourth proportional to 178.39, 245.90 and 131.62 is: 181.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.39 : 245.90 = 131.62 : x
  2. Step 2: Convert to fraction form
    178.39/245.90 = 131.62/x
  3. Step 3: Cross multiply
    178.39x = 245.90 × 131.62
  4. Step 4: Simplify right side
    178.39x = 32,363.47
  5. Step 5: Solve for x
    x = 32,363.47/178.39
  6. Step 6: Final answer
    x = 181.42

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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.