Home / 81,194.96-121,789.68-28,603.06

Finding the Fourth Proportional to 81,194.96, 121,789.68 and 28,603.06

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Solution

The fourth proportional to 81,194.96, 121,789.68 and 28,603.06 is: 42,903.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,194.96 : 121,789.68 = 28,603.06 : x
  2. Step 2: Convert to fraction form
    81,194.96/121,789.68 = 28,603.06/x
  3. Step 3: Cross multiply
    81,194.96x = 121,789.68 × 28,603.06
  4. Step 4: Simplify right side
    81,194.96x = 3,483,557,524.42
  5. Step 5: Solve for x
    x = 3,483,557,524.42/81,194.96
  6. Step 6: Final answer
    x = 42,903.62

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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.