Home / 81,028.34-121,542.51-21,863.91

Finding the Fourth Proportional to 81,028.34, 121,542.51 and 21,863.91

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Solution

The fourth proportional to 81,028.34, 121,542.51 and 21,863.91 is: 32,795.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,028.34 : 121,542.51 = 21,863.91 : x
  2. Step 2: Convert to fraction form
    81,028.34/121,542.51 = 21,863.91/x
  3. Step 3: Cross multiply
    81,028.34x = 121,542.51 × 21,863.91
  4. Step 4: Simplify right side
    81,028.34x = 2,657,394,499.81
  5. Step 5: Solve for x
    x = 2,657,394,499.81/81,028.34
  6. Step 6: Final answer
    x = 32,795.87

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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.