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Finding the Fourth Proportional to 110,692.40, 165,844.20 and 90,863.60

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Solution

The fourth proportional to 110,692.40, 165,844.20 and 90,863.60 is: 136,135.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,692.40 : 165,844.20 = 90,863.60 : x
  2. Step 2: Convert to fraction form
    110,692.40/165,844.20 = 90,863.60/x
  3. Step 3: Cross multiply
    110,692.40x = 165,844.20 × 90,863.60
  4. Step 4: Simplify right side
    110,692.40x = 15,069,201,051.12
  5. Step 5: Solve for x
    x = 15,069,201,051.12/110,692.40
  6. Step 6: Final answer
    x = 136,135.82

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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.