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Finding the Fourth Proportional to 60,976.60, 91,398.17 and 31,396.21

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Solution

The fourth proportional to 60,976.60, 91,398.17 and 31,396.21 is: 47,059.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,976.60 : 91,398.17 = 31,396.21 : x
  2. Step 2: Convert to fraction form
    60,976.60/91,398.17 = 31,396.21/x
  3. Step 3: Cross multiply
    60,976.60x = 91,398.17 × 31,396.21
  4. Step 4: Simplify right side
    60,976.60x = 2,869,555,988.93
  5. Step 5: Solve for x
    x = 2,869,555,988.93/60,976.60
  6. Step 6: Final answer
    x = 47,059.96

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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.