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Finding the Fourth Proportional to 140,378.99, 193,723.08 and 76,716.78

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Solution

The fourth proportional to 140,378.99, 193,723.08 and 76,716.78 is: 105,869.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,378.99 : 193,723.08 = 76,716.78 : x
  2. Step 2: Convert to fraction form
    140,378.99/193,723.08 = 76,716.78/x
  3. Step 3: Cross multiply
    140,378.99x = 193,723.08 × 76,716.78
  4. Step 4: Simplify right side
    140,378.99x = 14,861,810,909.28
  5. Step 5: Solve for x
    x = 14,861,810,909.28/140,378.99
  6. Step 6: Final answer
    x = 105,869.20

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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.