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Finding the Fourth Proportional to 109,292.80, 163,906.80 and 42,694.60

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Solution

The fourth proportional to 109,292.80, 163,906.80 and 42,694.60 is: 64,029.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,292.80 : 163,906.80 = 42,694.60 : x
  2. Step 2: Convert to fraction form
    109,292.80/163,906.80 = 42,694.60/x
  3. Step 3: Cross multiply
    109,292.80x = 163,906.80 × 42,694.60
  4. Step 4: Simplify right side
    109,292.80x = 6,997,935,263.28
  5. Step 5: Solve for x
    x = 6,997,935,263.28/109,292.80
  6. Step 6: Final answer
    x = 64,029.24

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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.