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Finding the Fourth Proportional to 81,205.90, 121,808.79 and 22,050.25

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Solution

The fourth proportional to 81,205.90, 121,808.79 and 22,050.25 is: 33,075.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,205.90 : 121,808.79 = 22,050.25 : x
  2. Step 2: Convert to fraction form
    81,205.90/121,808.79 = 22,050.25/x
  3. Step 3: Cross multiply
    81,205.90x = 121,808.79 × 22,050.25
  4. Step 4: Simplify right side
    81,205.90x = 2,685,914,271.70
  5. Step 5: Solve for x
    x = 2,685,914,271.70/81,205.90
  6. Step 6: Final answer
    x = 33,075.36

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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.