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Finding the Fourth Proportional to 51.01, 76.90 and 48.36

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Solution

The fourth proportional to 51.01, 76.90 and 48.36 is: 72.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.01 : 76.90 = 48.36 : x
  2. Step 2: Convert to fraction form
    51.01/76.90 = 48.36/x
  3. Step 3: Cross multiply
    51.01x = 76.90 × 48.36
  4. Step 4: Simplify right side
    51.01x = 3,718.88
  5. Step 5: Solve for x
    x = 3,718.88/51.01
  6. Step 6: Final answer
    x = 72.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.