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Finding the Fourth Proportional to 70,475.20, 105,597.60 and 58,724.80

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Solution

The fourth proportional to 70,475.20, 105,597.60 and 58,724.80 is: 87,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,475.20 : 105,597.60 = 58,724.80 : x
  2. Step 2: Convert to fraction form
    70,475.20/105,597.60 = 58,724.80/x
  3. Step 3: Cross multiply
    70,475.20x = 105,597.60 × 58,724.80
  4. Step 4: Simplify right side
    70,475.20x = 6,201,197,940.48
  5. Step 5: Solve for x
    x = 6,201,197,940.48/70,475.20
  6. Step 6: Final answer
    x = 87,991.21

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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.