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Finding the Fourth Proportional to 141,805.80, 195,691.60 and 78,143.58

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Solution

The fourth proportional to 141,805.80, 195,691.60 and 78,143.58 is: 107,837.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,805.80 : 195,691.60 = 78,143.58 : x
  2. Step 2: Convert to fraction form
    141,805.80/195,691.60 = 78,143.58/x
  3. Step 3: Cross multiply
    141,805.80x = 195,691.60 × 78,143.58
  4. Step 4: Simplify right side
    141,805.80x = 15,292,042,199.93
  5. Step 5: Solve for x
    x = 15,292,042,199.93/141,805.80
  6. Step 6: Final answer
    x = 107,837.92

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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.