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Finding the Fourth Proportional to 70,276.67, 105,415.01 and 20,356.79

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Solution

The fourth proportional to 70,276.67, 105,415.01 and 20,356.79 is: 30,535.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,276.67 : 105,415.01 = 20,356.79 : x
  2. Step 2: Convert to fraction form
    70,276.67/105,415.01 = 20,356.79/x
  3. Step 3: Cross multiply
    70,276.67x = 105,415.01 × 20,356.79
  4. Step 4: Simplify right side
    70,276.67x = 2,145,910,592.56
  5. Step 5: Solve for x
    x = 2,145,910,592.56/70,276.67
  6. Step 6: Final answer
    x = 30,535.18

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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.