Home / 81,028.87-121,543.30-21,864.54

Finding the Fourth Proportional to 81,028.87, 121,543.30 and 21,864.54

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Solution

The fourth proportional to 81,028.87, 121,543.30 and 21,864.54 is: 32,796.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,028.87 : 121,543.30 = 21,864.54 : x
  2. Step 2: Convert to fraction form
    81,028.87/121,543.30 = 21,864.54/x
  3. Step 3: Cross multiply
    81,028.87x = 121,543.30 × 21,864.54
  4. Step 4: Simplify right side
    81,028.87x = 2,657,488,344.58
  5. Step 5: Solve for x
    x = 2,657,488,344.58/81,028.87
  6. Step 6: Final answer
    x = 32,796.81

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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.