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Finding the Fourth Proportional to 71,719.20, 107,627.40 and 46,698.30

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Solution

The fourth proportional to 71,719.20, 107,627.40 and 46,698.30 is: 70,079.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,719.20 : 107,627.40 = 46,698.30 : x
  2. Step 2: Convert to fraction form
    71,719.20/107,627.40 = 46,698.30/x
  3. Step 3: Cross multiply
    71,719.20x = 107,627.40 × 46,698.30
  4. Step 4: Simplify right side
    71,719.20x = 5,026,016,613.42
  5. Step 5: Solve for x
    x = 5,026,016,613.42/71,719.20
  6. Step 6: Final answer
    x = 70,079.09

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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.