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Finding the Fourth Proportional to 188,520.60, 260,163.39 and 103,639.80

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Solution

The fourth proportional to 188,520.60, 260,163.39 and 103,639.80 is: 143,025.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,520.60 : 260,163.39 = 103,639.80 : x
  2. Step 2: Convert to fraction form
    188,520.60/260,163.39 = 103,639.80/x
  3. Step 3: Cross multiply
    188,520.60x = 260,163.39 × 103,639.80
  4. Step 4: Simplify right side
    188,520.60x = 26,963,281,706.92
  5. Step 5: Solve for x
    x = 26,963,281,706.92/188,520.60
  6. Step 6: Final answer
    x = 143,025.65

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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.