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Finding the Fourth Proportional to 111,966.43, 154,503.50 and 66,637.10

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Solution

The fourth proportional to 111,966.43, 154,503.50 and 66,637.10 is: 91,953.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,966.43 : 154,503.50 = 66,637.10 : x
  2. Step 2: Convert to fraction form
    111,966.43/154,503.50 = 66,637.10/x
  3. Step 3: Cross multiply
    111,966.43x = 154,503.50 × 66,637.10
  4. Step 4: Simplify right side
    111,966.43x = 10,295,665,179.85
  5. Step 5: Solve for x
    x = 10,295,665,179.85/111,966.43
  6. Step 6: Final answer
    x = 91,953.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.