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Finding the Fourth Proportional to 78,373.45, 117,560.18 and 66,563.65

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Solution

The fourth proportional to 78,373.45, 117,560.18 and 66,563.65 is: 99,845.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,373.45 : 117,560.18 = 66,563.65 : x
  2. Step 2: Convert to fraction form
    78,373.45/117,560.18 = 66,563.65/x
  3. Step 3: Cross multiply
    78,373.45x = 117,560.18 × 66,563.65
  4. Step 4: Simplify right side
    78,373.45x = 7,825,234,342.64
  5. Step 5: Solve for x
    x = 7,825,234,342.64/78,373.45
  6. Step 6: Final answer
    x = 99,845.48

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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.