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Finding the Fourth Proportional to 70,186.80, 105,285.72 and 23,439.84

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Solution

The fourth proportional to 70,186.80, 105,285.72 and 23,439.84 is: 35,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,186.80 : 105,285.72 = 23,439.84 : x
  2. Step 2: Convert to fraction form
    70,186.80/105,285.72 = 23,439.84/x
  3. Step 3: Cross multiply
    70,186.80x = 105,285.72 × 23,439.84
  4. Step 4: Simplify right side
    70,186.80x = 2,467,880,431.08
  5. Step 5: Solve for x
    x = 2,467,880,431.08/70,186.80
  6. Step 6: Final answer
    x = 35,161.60

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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.