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Finding the Fourth Proportional to 127,880.73, 191,885.90 and 86,240.25

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Solution

The fourth proportional to 127,880.73, 191,885.90 and 86,240.25 is: 129,404.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,880.73 : 191,885.90 = 86,240.25 : x
  2. Step 2: Convert to fraction form
    127,880.73/191,885.90 = 86,240.25/x
  3. Step 3: Cross multiply
    127,880.73x = 191,885.90 × 86,240.25
  4. Step 4: Simplify right side
    127,880.73x = 16,548,287,556.27
  5. Step 5: Solve for x
    x = 16,548,287,556.27/127,880.73
  6. Step 6: Final answer
    x = 129,404.07

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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.