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Finding the Fourth Proportional to 171,505.16, 236,691.78 and 99,891.80

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Solution

The fourth proportional to 171,505.16, 236,691.78 and 99,891.80 is: 137,859.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,505.16 : 236,691.78 = 99,891.80 : x
  2. Step 2: Convert to fraction form
    171,505.16/236,691.78 = 99,891.80/x
  3. Step 3: Cross multiply
    171,505.16x = 236,691.78 × 99,891.80
  4. Step 4: Simplify right side
    171,505.16x = 23,643,567,949.40
  5. Step 5: Solve for x
    x = 23,643,567,949.40/171,505.16
  6. Step 6: Final answer
    x = 137,859.22

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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.