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Finding the Fourth Proportional to 111,641.76, 154,043.91 and 71,324.55

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Solution

The fourth proportional to 111,641.76, 154,043.91 and 71,324.55 is: 98,414.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,641.76 : 154,043.91 = 71,324.55 : x
  2. Step 2: Convert to fraction form
    111,641.76/154,043.91 = 71,324.55/x
  3. Step 3: Cross multiply
    111,641.76x = 154,043.91 × 71,324.55
  4. Step 4: Simplify right side
    111,641.76x = 10,987,112,560.99
  5. Step 5: Solve for x
    x = 10,987,112,560.99/111,641.76
  6. Step 6: Final answer
    x = 98,414.00

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1.5x scale

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.