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Finding the Fourth Proportional to 51.30, 76.14 and 48.87

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Solution

The fourth proportional to 51.30, 76.14 and 48.87 is: 72.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.30 : 76.14 = 48.87 : x
  2. Step 2: Convert to fraction form
    51.30/76.14 = 48.87/x
  3. Step 3: Cross multiply
    51.30x = 76.14 × 48.87
  4. Step 4: Simplify right side
    51.30x = 3,720.96
  5. Step 5: Solve for x
    x = 3,720.96/51.30
  6. Step 6: Final answer
    x = 72.53

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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.