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Finding the Fourth Proportional to 71,597.90, 107,388.62 and 19,011.50

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Solution

The fourth proportional to 71,597.90, 107,388.62 and 19,011.50 is: 28,515.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,597.90 : 107,388.62 = 19,011.50 : x
  2. Step 2: Convert to fraction form
    71,597.90/107,388.62 = 19,011.50/x
  3. Step 3: Cross multiply
    71,597.90x = 107,388.62 × 19,011.50
  4. Step 4: Simplify right side
    71,597.90x = 2,041,618,749.13
  5. Step 5: Solve for x
    x = 2,041,618,749.13/71,597.90
  6. Step 6: Final answer
    x = 28,515.06

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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.