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Finding the Fourth Proportional to 51.48, 70.94 and 36.90

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Solution

The fourth proportional to 51.48, 70.94 and 36.90 is: 50.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.48 : 70.94 = 36.90 : x
  2. Step 2: Convert to fraction form
    51.48/70.94 = 36.90/x
  3. Step 3: Cross multiply
    51.48x = 70.94 × 36.90
  4. Step 4: Simplify right side
    51.48x = 2,617.78
  5. Step 5: Solve for x
    x = 2,617.78/51.48
  6. Step 6: Final answer
    x = 50.85

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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.