Home / 81,022.68-121,460.13-28,403.46

Finding the Fourth Proportional to 81,022.68, 121,460.13 and 28,403.46

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Solution

The fourth proportional to 81,022.68, 121,460.13 and 28,403.46 is: 42,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,022.68 : 121,460.13 = 28,403.46 : x
  2. Step 2: Convert to fraction form
    81,022.68/121,460.13 = 28,403.46/x
  3. Step 3: Cross multiply
    81,022.68x = 121,460.13 × 28,403.46
  4. Step 4: Simplify right side
    81,022.68x = 3,449,887,944.05
  5. Step 5: Solve for x
    x = 3,449,887,944.05/81,022.68
  6. Step 6: Final answer
    x = 42,579.29

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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.