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Finding the Fourth Proportional to 71,489.70, 98,667.63 and 39,668.85

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Solution

The fourth proportional to 71,489.70, 98,667.63 and 39,668.85 is: 54,749.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.70 : 98,667.63 = 39,668.85 : x
  2. Step 2: Convert to fraction form
    71,489.70/98,667.63 = 39,668.85/x
  3. Step 3: Cross multiply
    71,489.70x = 98,667.63 × 39,668.85
  4. Step 4: Simplify right side
    71,489.70x = 3,914,031,414.33
  5. Step 5: Solve for x
    x = 3,914,031,414.33/71,489.70
  6. Step 6: Final answer
    x = 54,749.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.