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Finding the Fourth Proportional to 71,673.96, 98,908.92 and 39,838.80

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Solution

The fourth proportional to 71,673.96, 98,908.92 and 39,838.80 is: 54,976.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,673.96 : 98,908.92 = 39,838.80 : x
  2. Step 2: Convert to fraction form
    71,673.96/98,908.92 = 39,838.80/x
  3. Step 3: Cross multiply
    71,673.96x = 98,908.92 × 39,838.80
  4. Step 4: Simplify right side
    71,673.96x = 3,940,412,682.10
  5. Step 5: Solve for x
    x = 3,940,412,682.10/71,673.96
  6. Step 6: Final answer
    x = 54,976.91

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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.