Home / 81,489.76-122,140.04-30,856.59

Finding the Fourth Proportional to 81,489.76, 122,140.04 and 30,856.59

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Solution

The fourth proportional to 81,489.76, 122,140.04 and 30,856.59 is: 46,249.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,489.76 : 122,140.04 = 30,856.59 : x
  2. Step 2: Convert to fraction form
    81,489.76/122,140.04 = 30,856.59/x
  3. Step 3: Cross multiply
    81,489.76x = 122,140.04 × 30,856.59
  4. Step 4: Simplify right side
    81,489.76x = 3,768,825,136.86
  5. Step 5: Solve for x
    x = 3,768,825,136.86/81,489.76
  6. Step 6: Final answer
    x = 46,249.06

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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.