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Finding the Fourth Proportional to 71,172.98, 106,755.80 and 21,253.49

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Solution

The fourth proportional to 71,172.98, 106,755.80 and 21,253.49 is: 31,879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,172.98 : 106,755.80 = 21,253.49 : x
  2. Step 2: Convert to fraction form
    71,172.98/106,755.80 = 21,253.49/x
  3. Step 3: Cross multiply
    71,172.98x = 106,755.80 × 21,253.49
  4. Step 4: Simplify right side
    71,172.98x = 2,268,932,687.70
  5. Step 5: Solve for x
    x = 2,268,932,687.70/71,172.98
  6. Step 6: Final answer
    x = 31,879.13

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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.