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Finding the Fourth Proportional to 127,078.60, 190,617.90 and 69,997.90

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Solution

The fourth proportional to 127,078.60, 190,617.90 and 69,997.90 is: 104,996.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,078.60 : 190,617.90 = 69,997.90 : x
  2. Step 2: Convert to fraction form
    127,078.60/190,617.90 = 69,997.90/x
  3. Step 3: Cross multiply
    127,078.60x = 190,617.90 × 69,997.90
  4. Step 4: Simplify right side
    127,078.60x = 13,342,852,702.41
  5. Step 5: Solve for x
    x = 13,342,852,702.41/127,078.60
  6. Step 6: Final answer
    x = 104,996.85

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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.