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Finding the Fourth Proportional to 47.68, 70.72 and 47.56

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Solution

The fourth proportional to 47.68, 70.72 and 47.56 is: 70.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.68 : 70.72 = 47.56 : x
  2. Step 2: Convert to fraction form
    47.68/70.72 = 47.56/x
  3. Step 3: Cross multiply
    47.68x = 70.72 × 47.56
  4. Step 4: Simplify right side
    47.68x = 3,363.44
  5. Step 5: Solve for x
    x = 3,363.44/47.68
  6. Step 6: Final answer
    x = 70.54

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.