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Finding the Fourth Proportional to 81,390.61, 122,069.44 and 22,221.33

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Solution

The fourth proportional to 81,390.61, 122,069.44 and 22,221.33 is: 33,327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.61 : 122,069.44 = 22,221.33 : x
  2. Step 2: Convert to fraction form
    81,390.61/122,069.44 = 22,221.33/x
  3. Step 3: Cross multiply
    81,390.61x = 122,069.44 × 22,221.33
  4. Step 4: Simplify right side
    81,390.61x = 2,712,545,309.16
  5. Step 5: Solve for x
    x = 2,712,545,309.16/81,390.61
  6. Step 6: Final answer
    x = 33,327.50

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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.