Home / 80,783.04-121,172.82-21,618.70

Finding the Fourth Proportional to 80,783.04, 121,172.82 and 21,618.70

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Solution

The fourth proportional to 80,783.04, 121,172.82 and 21,618.70 is: 32,427.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,783.04 : 121,172.82 = 21,618.70 : x
  2. Step 2: Convert to fraction form
    80,783.04/121,172.82 = 21,618.70/x
  3. Step 3: Cross multiply
    80,783.04x = 121,172.82 × 21,618.70
  4. Step 4: Simplify right side
    80,783.04x = 2,619,598,843.73
  5. Step 5: Solve for x
    x = 2,619,598,843.73/80,783.04
  6. Step 6: Final answer
    x = 32,427.58

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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.