Home / 80,872.14-121,291.50-21,693.78

Finding the Fourth Proportional to 80,872.14, 121,291.50 and 21,693.78

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Solution

The fourth proportional to 80,872.14, 121,291.50 and 21,693.78 is: 32,536.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,872.14 : 121,291.50 = 21,693.78 : x
  2. Step 2: Convert to fraction form
    80,872.14/121,291.50 = 21,693.78/x
  3. Step 3: Cross multiply
    80,872.14x = 121,291.50 × 21,693.78
  4. Step 4: Simplify right side
    80,872.14x = 2,631,271,116.87
  5. Step 5: Solve for x
    x = 2,631,271,116.87/80,872.14
  6. Step 6: Final answer
    x = 32,536.19

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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.