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Finding the Fourth Proportional to 51,805.78, 71,491.86 and 29,144.78

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Solution

The fourth proportional to 51,805.78, 71,491.86 and 29,144.78 is: 40,219.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,805.78 : 71,491.86 = 29,144.78 : x
  2. Step 2: Convert to fraction form
    51,805.78/71,491.86 = 29,144.78/x
  3. Step 3: Cross multiply
    51,805.78x = 71,491.86 × 29,144.78
  4. Step 4: Simplify right side
    51,805.78x = 2,083,614,531.49
  5. Step 5: Solve for x
    x = 2,083,614,531.49/51,805.78
  6. Step 6: Final answer
    x = 40,219.73

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1.5x scale

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.