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Finding the Fourth Proportional to 127,520.80, 191,059.52 and 89,489.40

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Solution

The fourth proportional to 127,520.80, 191,059.52 and 89,489.40 is: 134,078.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,520.80 : 191,059.52 = 89,489.40 : x
  2. Step 2: Convert to fraction form
    127,520.80/191,059.52 = 89,489.40/x
  3. Step 3: Cross multiply
    127,520.80x = 191,059.52 × 89,489.40
  4. Step 4: Simplify right side
    127,520.80x = 17,097,801,809.09
  5. Step 5: Solve for x
    x = 17,097,801,809.09/127,520.80
  6. Step 6: Final answer
    x = 134,078.53

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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.