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Finding the Fourth Proportional to 71,668.71, 98,906.19 and 39,838.14

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Solution

The fourth proportional to 71,668.71, 98,906.19 and 39,838.14 is: 54,978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668.71 : 98,906.19 = 39,838.14 : x
  2. Step 2: Convert to fraction form
    71,668.71/98,906.19 = 39,838.14/x
  3. Step 3: Cross multiply
    71,668.71x = 98,906.19 × 39,838.14
  4. Step 4: Simplify right side
    71,668.71x = 3,940,238,644.09
  5. Step 5: Solve for x
    x = 3,940,238,644.09/71,668.71
  6. Step 6: Final answer
    x = 54,978.51

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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.