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Finding the Fourth Proportional to 47.92, 71.50 and 45.52

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Solution

The fourth proportional to 47.92, 71.50 and 45.52 is: 67.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.92 : 71.50 = 45.52 : x
  2. Step 2: Convert to fraction form
    47.92/71.50 = 45.52/x
  3. Step 3: Cross multiply
    47.92x = 71.50 × 45.52
  4. Step 4: Simplify right side
    47.92x = 3,254.68
  5. Step 5: Solve for x
    x = 3,254.68/47.92
  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.