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Finding the Fourth Proportional to 77,892.90, 116,839.34 and 18,728.56

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Solution

The fourth proportional to 77,892.90, 116,839.34 and 18,728.56 is: 28,092.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,892.90 : 116,839.34 = 18,728.56 : x
  2. Step 2: Convert to fraction form
    77,892.90/116,839.34 = 18,728.56/x
  3. Step 3: Cross multiply
    77,892.90x = 116,839.34 × 18,728.56
  4. Step 4: Simplify right side
    77,892.90x = 2,188,232,589.55
  5. Step 5: Solve for x
    x = 2,188,232,589.55/77,892.90
  6. Step 6: Final answer
    x = 28,092.84

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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.