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Finding the Fourth Proportional to 71,144.70, 106,722.45 and 21,220.89

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Solution

The fourth proportional to 71,144.70, 106,722.45 and 21,220.89 is: 31,832.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,144.70 : 106,722.45 = 21,220.89 : x
  2. Step 2: Convert to fraction form
    71,144.70/106,722.45 = 21,220.89/x
  3. Step 3: Cross multiply
    71,144.70x = 106,722.45 × 21,220.89
  4. Step 4: Simplify right side
    71,144.70x = 2,264,745,371.98
  5. Step 5: Solve for x
    x = 2,264,745,371.98/71,144.70
  6. Step 6: Final answer
    x = 31,832.95

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1.5x scale

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.