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Finding the Fourth Proportional to 77,049.20, 115,444.20 and 65,903.60

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Solution

The fourth proportional to 77,049.20, 115,444.20 and 65,903.60 is: 98,744.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,049.20 : 115,444.20 = 65,903.60 : x
  2. Step 2: Convert to fraction form
    77,049.20/115,444.20 = 65,903.60/x
  3. Step 3: Cross multiply
    77,049.20x = 115,444.20 × 65,903.60
  4. Step 4: Simplify right side
    77,049.20x = 7,608,188,379.12
  5. Step 5: Solve for x
    x = 7,608,188,379.12/77,049.20
  6. Step 6: Final answer
    x = 98,744.55

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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.