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Finding the Fourth Proportional to 81,443.34, 122,172.30 and 22,279.32

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Solution

The fourth proportional to 81,443.34, 122,172.30 and 22,279.32 is: 33,420.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,443.34 : 122,172.30 = 22,279.32 : x
  2. Step 2: Convert to fraction form
    81,443.34/122,172.30 = 22,279.32/x
  3. Step 3: Cross multiply
    81,443.34x = 122,172.30 × 22,279.32
  4. Step 4: Simplify right side
    81,443.34x = 2,721,915,766.84
  5. Step 5: Solve for x
    x = 2,721,915,766.84/81,443.34
  6. Step 6: Final answer
    x = 33,420.97

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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.