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Finding the Fourth Proportional to 85,000.60, 127,209.30 and 78,002.20

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Solution

The fourth proportional to 85,000.60, 127,209.30 and 78,002.20 is: 116,735.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,000.60 : 127,209.30 = 78,002.20 : x
  2. Step 2: Convert to fraction form
    85,000.60/127,209.30 = 78,002.20/x
  3. Step 3: Cross multiply
    85,000.60x = 127,209.30 × 78,002.20
  4. Step 4: Simplify right side
    85,000.60x = 9,922,605,260.46
  5. Step 5: Solve for x
    x = 9,922,605,260.46/85,000.60
  6. Step 6: Final answer
    x = 116,735.71

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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.