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Finding the Fourth Proportional to 83,857.40, 125,786.10 and 57,613.40

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Solution

The fourth proportional to 83,857.40, 125,786.10 and 57,613.40 is: 86,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,857.40 : 125,786.10 = 57,613.40 : x
  2. Step 2: Convert to fraction form
    83,857.40/125,786.10 = 57,613.40/x
  3. Step 3: Cross multiply
    83,857.40x = 125,786.10 × 57,613.40
  4. Step 4: Simplify right side
    83,857.40x = 7,246,964,893.74
  5. Step 5: Solve for x
    x = 7,246,964,893.74/83,857.40
  6. Step 6: Final answer
    x = 86,420.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.