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Finding the Fourth Proportional to 91,763, 126,638.76 and 51,479.37

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Solution

The fourth proportional to 91,763, 126,638.76 and 51,479.37 is: 71,044.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,763 : 126,638.76 = 51,479.37 : x
  2. Step 2: Convert to fraction form
    91,763/126,638.76 = 51,479.37/x
  3. Step 3: Cross multiply
    91,763x = 126,638.76 × 51,479.37
  4. Step 4: Simplify right side
    91,763x = 6,519,283,324.98
  5. Step 5: Solve for x
    x = 6,519,283,324.98/91,763
  6. Step 6: Final answer
    x = 71,044.79

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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.