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Finding the Fourth Proportional to 209,886.32, 289,634.64 and 114,390.96

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Solution

The fourth proportional to 209,886.32, 289,634.64 and 114,390.96 is: 157,854.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,886.32 : 289,634.64 = 114,390.96 : x
  2. Step 2: Convert to fraction form
    209,886.32/289,634.64 = 114,390.96/x
  3. Step 3: Cross multiply
    209,886.32x = 289,634.64 × 114,390.96
  4. Step 4: Simplify right side
    209,886.32x = 33,131,584,518.85
  5. Step 5: Solve for x
    x = 33,131,584,518.85/209,886.32
  6. Step 6: Final answer
    x = 157,854.90

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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.