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Finding the Fourth Proportional to 235,561.05, 325,079.60 and 128,136.83

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Solution

The fourth proportional to 235,561.05, 325,079.60 and 128,136.83 is: 176,831.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,561.05 : 325,079.60 = 128,136.83 : x
  2. Step 2: Convert to fraction form
    235,561.05/325,079.60 = 128,136.83/x
  3. Step 3: Cross multiply
    235,561.05x = 325,079.60 × 128,136.83
  4. Step 4: Simplify right side
    235,561.05x = 41,654,667,175.59
  5. Step 5: Solve for x
    x = 41,654,667,175.59/235,561.05
  6. Step 6: Final answer
    x = 176,831.73

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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.