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Finding the Fourth Proportional to 57.67, 86.58 and 48.72

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Solution

The fourth proportional to 57.67, 86.58 and 48.72 is: 73.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.67 : 86.58 = 48.72 : x
  2. Step 2: Convert to fraction form
    57.67/86.58 = 48.72/x
  3. Step 3: Cross multiply
    57.67x = 86.58 × 48.72
  4. Step 4: Simplify right side
    57.67x = 4,218.18
  5. Step 5: Solve for x
    x = 4,218.18/57.67
  6. Step 6: Final answer
    x = 73.14

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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.