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Finding the Fourth Proportional to 178.40, 246.12 and 134.22

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Solution

The fourth proportional to 178.40, 246.12 and 134.22 is: 185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.40 : 246.12 = 134.22 : x
  2. Step 2: Convert to fraction form
    178.40/246.12 = 134.22/x
  3. Step 3: Cross multiply
    178.40x = 246.12 × 134.22
  4. Step 4: Simplify right side
    178.40x = 33,035.40
  5. Step 5: Solve for x
    x = 33,035.40/178.40
  6. Step 6: Final answer
    x = 185.17

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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.