Home / 81,420.82-122,121.51-22,261.66

Finding the Fourth Proportional to 81,420.82, 122,121.51 and 22,261.66

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Solution

The fourth proportional to 81,420.82, 122,121.51 and 22,261.66 is: 33,389.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,420.82 : 122,121.51 = 22,261.66 : x
  2. Step 2: Convert to fraction form
    81,420.82/122,121.51 = 22,261.66/x
  3. Step 3: Cross multiply
    81,420.82x = 122,121.51 × 22,261.66
  4. Step 4: Simplify right side
    81,420.82x = 2,718,627,534.31
  5. Step 5: Solve for x
    x = 2,718,627,534.31/81,420.82
  6. Step 6: Final answer
    x = 33,389.83

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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.