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Finding the Fourth Proportional to 71,698.80, 98,940.29 and 39,867.02

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Solution

The fourth proportional to 71,698.80, 98,940.29 and 39,867.02 is: 55,014.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,698.80 : 98,940.29 = 39,867.02 : x
  2. Step 2: Convert to fraction form
    71,698.80/98,940.29 = 39,867.02/x
  3. Step 3: Cross multiply
    71,698.80x = 98,940.29 × 39,867.02
  4. Step 4: Simplify right side
    71,698.80x = 3,944,454,197.23
  5. Step 5: Solve for x
    x = 3,944,454,197.23/71,698.80
  6. Step 6: Final answer
    x = 55,014.23

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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.