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Finding the Fourth Proportional to 127,847.80, 191,771.70 and 65,639.80

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Solution

The fourth proportional to 127,847.80, 191,771.70 and 65,639.80 is: 98,459.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,847.80 : 191,771.70 = 65,639.80 : x
  2. Step 2: Convert to fraction form
    127,847.80/191,771.70 = 65,639.80/x
  3. Step 3: Cross multiply
    127,847.80x = 191,771.70 × 65,639.80
  4. Step 4: Simplify right side
    127,847.80x = 12,587,856,033.66
  5. Step 5: Solve for x
    x = 12,587,856,033.66/127,847.80
  6. Step 6: Final answer
    x = 98,459.70

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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.