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Finding the Fourth Proportional to 193,251.20, 289,862.40 and 80,902.40

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Solution

The fourth proportional to 193,251.20, 289,862.40 and 80,902.40 is: 121,347.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,251.20 : 289,862.40 = 80,902.40 : x
  2. Step 2: Convert to fraction form
    193,251.20/289,862.40 = 80,902.40/x
  3. Step 3: Cross multiply
    193,251.20x = 289,862.40 × 80,902.40
  4. Step 4: Simplify right side
    193,251.20x = 23,450,563,829.76
  5. Step 5: Solve for x
    x = 23,450,563,829.76/193,251.20
  6. Step 6: Final answer
    x = 121,347.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.