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Finding the Fourth Proportional to 179.18, 247.17 and 105.45

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Solution

The fourth proportional to 179.18, 247.17 and 105.45 is: 145.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.18 : 247.17 = 105.45 : x
  2. Step 2: Convert to fraction form
    179.18/247.17 = 105.45/x
  3. Step 3: Cross multiply
    179.18x = 247.17 × 105.45
  4. Step 4: Simplify right side
    179.18x = 26,064.08
  5. Step 5: Solve for x
    x = 26,064.08/179.18
  6. Step 6: Final answer
    x = 145.47

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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.