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Finding the Fourth Proportional to 57.42, 86.56 and 48.46

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Solution

The fourth proportional to 57.42, 86.56 and 48.46 is: 73.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.42 : 86.56 = 48.46 : x
  2. Step 2: Convert to fraction form
    57.42/86.56 = 48.46/x
  3. Step 3: Cross multiply
    57.42x = 86.56 × 48.46
  4. Step 4: Simplify right side
    57.42x = 4,194.70
  5. Step 5: Solve for x
    x = 4,194.70/57.42
  6. Step 6: Final answer
    x = 73.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.