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Finding the Fourth Proportional to 235,687.61, 325,248.05 and 128,255.69

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Solution

The fourth proportional to 235,687.61, 325,248.05 and 128,255.69 is: 176,992.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,687.61 : 325,248.05 = 128,255.69 : x
  2. Step 2: Convert to fraction form
    235,687.61/325,248.05 = 128,255.69/x
  3. Step 3: Cross multiply
    235,687.61x = 325,248.05 × 128,255.69
  4. Step 4: Simplify right side
    235,687.61x = 41,714,910,806.39
  5. Step 5: Solve for x
    x = 41,714,910,806.39/235,687.61
  6. Step 6: Final answer
    x = 176,992.38

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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.