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Finding the Fourth Proportional to 188,220.78, 259,630.65 and 111,689.55

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Solution

The fourth proportional to 188,220.78, 259,630.65 and 111,689.55 is: 154,063.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,220.78 : 259,630.65 = 111,689.55 : x
  2. Step 2: Convert to fraction form
    188,220.78/259,630.65 = 111,689.55/x
  3. Step 3: Cross multiply
    188,220.78x = 259,630.65 × 111,689.55
  4. Step 4: Simplify right side
    188,220.78x = 28,998,030,464.71
  5. Step 5: Solve for x
    x = 28,998,030,464.71/188,220.78
  6. Step 6: Final answer
    x = 154,063.92

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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.