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Finding the Fourth Proportional to 51.45, 71.03 and 36.87

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Solution

The fourth proportional to 51.45, 71.03 and 36.87 is: 50.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.45 : 71.03 = 36.87 : x
  2. Step 2: Convert to fraction form
    51.45/71.03 = 36.87/x
  3. Step 3: Cross multiply
    51.45x = 71.03 × 36.87
  4. Step 4: Simplify right side
    51.45x = 2,618.88
  5. Step 5: Solve for x
    x = 2,618.88/51.45
  6. Step 6: Final answer
    x = 50.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.