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Finding the Fourth Proportional to 179.05, 247.05 and 100.35

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Solution

The fourth proportional to 179.05, 247.05 and 100.35 is: 138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.05 : 247.05 = 100.35 : x
  2. Step 2: Convert to fraction form
    179.05/247.05 = 100.35/x
  3. Step 3: Cross multiply
    179.05x = 247.05 × 100.35
  4. Step 4: Simplify right side
    179.05x = 24,791.72
  5. Step 5: Solve for x
    x = 24,791.72/179.05
  6. Step 6: Final answer
    x = 138.46

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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.