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Finding the Fourth Proportional to 81,238.91, 121,860.84 and 22,075.83

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Solution

The fourth proportional to 81,238.91, 121,860.84 and 22,075.83 is: 33,114.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,238.91 : 121,860.84 = 22,075.83 : x
  2. Step 2: Convert to fraction form
    81,238.91/121,860.84 = 22,075.83/x
  3. Step 3: Cross multiply
    81,238.91x = 121,860.84 × 22,075.83
  4. Step 4: Simplify right side
    81,238.91x = 2,690,179,187.50
  5. Step 5: Solve for x
    x = 2,690,179,187.50/81,238.91
  6. Step 6: Final answer
    x = 33,114.42

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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.