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Finding the Fourth Proportional to 81,069.84, 111,844.20 and 54,169.74

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Solution

The fourth proportional to 81,069.84, 111,844.20 and 54,169.74 is: 74,732.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069.84 : 111,844.20 = 54,169.74 : x
  2. Step 2: Convert to fraction form
    81,069.84/111,844.20 = 54,169.74/x
  3. Step 3: Cross multiply
    81,069.84x = 111,844.20 × 54,169.74
  4. Step 4: Simplify right side
    81,069.84x = 6,058,571,234.51
  5. Step 5: Solve for x
    x = 6,058,571,234.51/81,069.84
  6. Step 6: Final answer
    x = 74,732.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.