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Finding the Fourth Proportional to 51.40, 76.91 and 32.15

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Solution

The fourth proportional to 51.40, 76.91 and 32.15 is: 48.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.40 : 76.91 = 32.15 : x
  2. Step 2: Convert to fraction form
    51.40/76.91 = 32.15/x
  3. Step 3: Cross multiply
    51.40x = 76.91 × 32.15
  4. Step 4: Simplify right side
    51.40x = 2,472.69
  5. Step 5: Solve for x
    x = 2,472.69/51.40
  6. Step 6: Final answer
    x = 48.11

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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.