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Finding the Fourth Proportional to 71,684.70, 98,901.78 and 39,847.46

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Solution

The fourth proportional to 71,684.70, 98,901.78 and 39,847.46 is: 54,976.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,684.70 : 98,901.78 = 39,847.46 : x
  2. Step 2: Convert to fraction form
    71,684.70/98,901.78 = 39,847.46/x
  3. Step 3: Cross multiply
    71,684.70x = 98,901.78 × 39,847.46
  4. Step 4: Simplify right side
    71,684.70x = 3,940,984,722.48
  5. Step 5: Solve for x
    x = 3,940,984,722.48/71,684.70
  6. Step 6: Final answer
    x = 54,976.65

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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.