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Finding the Fourth Proportional to 119.47, 179.30 and 47.38

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Solution

The fourth proportional to 119.47, 179.30 and 47.38 is: 71.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.47 : 179.30 = 47.38 : x
  2. Step 2: Convert to fraction form
    119.47/179.30 = 47.38/x
  3. Step 3: Cross multiply
    119.47x = 179.30 × 47.38
  4. Step 4: Simplify right side
    119.47x = 8,494.90
  5. Step 5: Solve for x
    x = 8,494.90/119.47
  6. Step 6: Final answer
    x = 71.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.