Home / 81,013.74-121,512.06-21,845.76

Finding the Fourth Proportional to 81,013.74, 121,512.06 and 21,845.76

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Solution

The fourth proportional to 81,013.74, 121,512.06 and 21,845.76 is: 32,766.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.74 : 121,512.06 = 21,845.76 : x
  2. Step 2: Convert to fraction form
    81,013.74/121,512.06 = 21,845.76/x
  3. Step 3: Cross multiply
    81,013.74x = 121,512.06 × 21,845.76
  4. Step 4: Simplify right side
    81,013.74x = 2,654,523,299.87
  5. Step 5: Solve for x
    x = 2,654,523,299.87/81,013.74
  6. Step 6: Final answer
    x = 32,766.33

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1.5x scale

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.