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Finding the Fourth Proportional to 81,872.81, 122,809.20 and 22,708.49

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Solution

The fourth proportional to 81,872.81, 122,809.20 and 22,708.49 is: 34,062.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,872.81 : 122,809.20 = 22,708.49 : x
  2. Step 2: Convert to fraction form
    81,872.81/122,809.20 = 22,708.49/x
  3. Step 3: Cross multiply
    81,872.81x = 122,809.20 × 22,708.49
  4. Step 4: Simplify right side
    81,872.81x = 2,788,810,876.06
  5. Step 5: Solve for x
    x = 2,788,810,876.06/81,872.81
  6. Step 6: Final answer
    x = 34,062.73

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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.