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Finding the Fourth Proportional to 95.80, 143.56 and 47.74

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Solution

The fourth proportional to 95.80, 143.56 and 47.74 is: 71.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.80 : 143.56 = 47.74 : x
  2. Step 2: Convert to fraction form
    95.80/143.56 = 47.74/x
  3. Step 3: Cross multiply
    95.80x = 143.56 × 47.74
  4. Step 4: Simplify right side
    95.80x = 6,853.26
  5. Step 5: Solve for x
    x = 6,853.26/95.80
  6. Step 6: Final answer
    x = 71.54

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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.