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Finding the Fourth Proportional to 178.30, 246.01 and 100.68

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Solution

The fourth proportional to 178.30, 246.01 and 100.68 is: 138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.30 : 246.01 = 100.68 : x
  2. Step 2: Convert to fraction form
    178.30/246.01 = 100.68/x
  3. Step 3: Cross multiply
    178.30x = 246.01 × 100.68
  4. Step 4: Simplify right side
    178.30x = 24,768.29
  5. Step 5: Solve for x
    x = 24,768.29/178.30
  6. Step 6: Final answer
    x = 138.91

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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.