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Finding the Fourth Proportional to 127,661.60, 191,722.80 and 92,640.80

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Solution

The fourth proportional to 127,661.60, 191,722.80 and 92,640.80 is: 139,128.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,661.60 : 191,722.80 = 92,640.80 : x
  2. Step 2: Convert to fraction form
    127,661.60/191,722.80 = 92,640.80/x
  3. Step 3: Cross multiply
    127,661.60x = 191,722.80 × 92,640.80
  4. Step 4: Simplify right side
    127,661.60x = 17,761,353,570.24
  5. Step 5: Solve for x
    x = 17,761,353,570.24/127,661.60
  6. Step 6: Final answer
    x = 139,128.40

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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.