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Finding the Fourth Proportional to 203,486.18, 280,805.60 and 112,841.91

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Solution

The fourth proportional to 203,486.18, 280,805.60 and 112,841.91 is: 155,718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,486.18 : 280,805.60 = 112,841.91 : x
  2. Step 2: Convert to fraction form
    203,486.18/280,805.60 = 112,841.91/x
  3. Step 3: Cross multiply
    203,486.18x = 280,805.60 × 112,841.91
  4. Step 4: Simplify right side
    203,486.18x = 31,686,640,524.80
  5. Step 5: Solve for x
    x = 31,686,640,524.80/203,486.18
  6. Step 6: Final answer
    x = 155,718.89

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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.