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Finding the Fourth Proportional to 84,609.89, 126,930.86 and 34,012.84

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Solution

The fourth proportional to 84,609.89, 126,930.86 and 34,012.84 is: 51,025.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,609.89 : 126,930.86 = 34,012.84 : x
  2. Step 2: Convert to fraction form
    84,609.89/126,930.86 = 34,012.84/x
  3. Step 3: Cross multiply
    84,609.89x = 126,930.86 × 34,012.84
  4. Step 4: Simplify right side
    84,609.89x = 4,317,278,227.52
  5. Step 5: Solve for x
    x = 4,317,278,227.52/84,609.89
  6. Step 6: Final answer
    x = 51,025.69

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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.