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Finding the Fourth Proportional to 109,664.60, 164,108.10 and 74,672.60

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Solution

The fourth proportional to 109,664.60, 164,108.10 and 74,672.60 is: 111,744.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,664.60 : 164,108.10 = 74,672.60 : x
  2. Step 2: Convert to fraction form
    109,664.60/164,108.10 = 74,672.60/x
  3. Step 3: Cross multiply
    109,664.60x = 164,108.10 × 74,672.60
  4. Step 4: Simplify right side
    109,664.60x = 12,254,378,508.06
  5. Step 5: Solve for x
    x = 12,254,378,508.06/109,664.60
  6. Step 6: Final answer
    x = 111,744.16

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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.