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Finding the Fourth Proportional to 47.88, 71.34 and 45.59

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Solution

The fourth proportional to 47.88, 71.34 and 45.59 is: 67.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.88 : 71.34 = 45.59 : x
  2. Step 2: Convert to fraction form
    47.88/71.34 = 45.59/x
  3. Step 3: Cross multiply
    47.88x = 71.34 × 45.59
  4. Step 4: Simplify right side
    47.88x = 3,251.86
  5. Step 5: Solve for x
    x = 3,251.86/47.88
  6. Step 6: Final answer
    x = 67.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.