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Finding the Fourth Proportional to 179.34, 247.46 and 100.64

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Solution

The fourth proportional to 179.34, 247.46 and 100.64 is: 138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.34 : 247.46 = 100.64 : x
  2. Step 2: Convert to fraction form
    179.34/247.46 = 100.64/x
  3. Step 3: Cross multiply
    179.34x = 247.46 × 100.64
  4. Step 4: Simplify right side
    179.34x = 24,904.87
  5. Step 5: Solve for x
    x = 24,904.87/179.34
  6. Step 6: Final answer
    x = 138.87

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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.