Home / 81,229.82-121,719.06-56,318.54

Finding the Fourth Proportional to 81,229.82, 121,719.06 and 56,318.54

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Solution

The fourth proportional to 81,229.82, 121,719.06 and 56,318.54 is: 84,390.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,229.82 : 121,719.06 = 56,318.54 : x
  2. Step 2: Convert to fraction form
    81,229.82/121,719.06 = 56,318.54/x
  3. Step 3: Cross multiply
    81,229.82x = 121,719.06 × 56,318.54
  4. Step 4: Simplify right side
    81,229.82x = 6,855,039,749.37
  5. Step 5: Solve for x
    x = 6,855,039,749.37/81,229.82
  6. Step 6: Final answer
    x = 84,390.68

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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.