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Finding the Fourth Proportional to 140,362.20, 193,699.44 and 76,700.40

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Solution

The fourth proportional to 140,362.20, 193,699.44 and 76,700.40 is: 105,846.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,362.20 : 193,699.44 = 76,700.40 : x
  2. Step 2: Convert to fraction form
    140,362.20/193,699.44 = 76,700.40/x
  3. Step 3: Cross multiply
    140,362.20x = 193,699.44 × 76,700.40
  4. Step 4: Simplify right side
    140,362.20x = 14,856,824,527.78
  5. Step 5: Solve for x
    x = 14,856,824,527.78/140,362.20
  6. Step 6: Final answer
    x = 105,846.34

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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.