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Finding the Fourth Proportional to 188,720.80, 260,441.84 and 108,163.87

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Solution

The fourth proportional to 188,720.80, 260,441.84 and 108,163.87 is: 149,270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,720.80 : 260,441.84 = 108,163.87 : x
  2. Step 2: Convert to fraction form
    188,720.80/260,441.84 = 108,163.87/x
  3. Step 3: Cross multiply
    188,720.80x = 260,441.84 × 108,163.87
  4. Step 4: Simplify right side
    188,720.80x = 28,170,396,943.63
  5. Step 5: Solve for x
    x = 28,170,396,943.63/188,720.80
  6. Step 6: Final answer
    x = 149,270.23

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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.