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Finding the Fourth Proportional to 147,391.60, 203,239.80 and 99,561.92

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Solution

The fourth proportional to 147,391.60, 203,239.80 and 99,561.92 is: 137,286.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,391.60 : 203,239.80 = 99,561.92 : x
  2. Step 2: Convert to fraction form
    147,391.60/203,239.80 = 99,561.92/x
  3. Step 3: Cross multiply
    147,391.60x = 203,239.80 × 99,561.92
  4. Step 4: Simplify right side
    147,391.60x = 20,234,944,708.42
  5. Step 5: Solve for x
    x = 20,234,944,708.42/147,391.60
  6. Step 6: Final answer
    x = 137,286.96

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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.