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Finding the Fourth Proportional to 209,777.76, 289,500.75 and 119,131.20

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Solution

The fourth proportional to 209,777.76, 289,500.75 and 119,131.20 is: 164,405.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,777.76 : 289,500.75 = 119,131.20 : x
  2. Step 2: Convert to fraction form
    209,777.76/289,500.75 = 119,131.20/x
  3. Step 3: Cross multiply
    209,777.76x = 289,500.75 × 119,131.20
  4. Step 4: Simplify right side
    209,777.76x = 34,488,571,748.40
  5. Step 5: Solve for x
    x = 34,488,571,748.40/209,777.76
  6. Step 6: Final answer
    x = 164,405.28

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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.