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Finding the Fourth Proportional to 178.08, 245.76 and 108.15

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Solution

The fourth proportional to 178.08, 245.76 and 108.15 is: 149.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.08 : 245.76 = 108.15 : x
  2. Step 2: Convert to fraction form
    178.08/245.76 = 108.15/x
  3. Step 3: Cross multiply
    178.08x = 245.76 × 108.15
  4. Step 4: Simplify right side
    178.08x = 26,580.28
  5. Step 5: Solve for x
    x = 26,580.28/178.08
  6. Step 6: Final answer
    x = 149.26

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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.