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Finding the Fourth Proportional to 178.04, 245.72 and 108.11

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Solution

The fourth proportional to 178.04, 245.72 and 108.11 is: 149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.04 : 245.72 = 108.11 : x
  2. Step 2: Convert to fraction form
    178.04/245.72 = 108.11/x
  3. Step 3: Cross multiply
    178.04x = 245.72 × 108.11
  4. Step 4: Simplify right side
    178.04x = 26,564.79
  5. Step 5: Solve for x
    x = 26,564.79/178.04
  6. Step 6: Final answer
    x = 149.21

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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.