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Finding the Fourth Proportional to 57,380.85, 86,085.11 and 19,935.47

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Solution

The fourth proportional to 57,380.85, 86,085.11 and 19,935.47 is: 29,908.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,380.85 : 86,085.11 = 19,935.47 : x
  2. Step 2: Convert to fraction form
    57,380.85/86,085.11 = 19,935.47/x
  3. Step 3: Cross multiply
    57,380.85x = 86,085.11 × 19,935.47
  4. Step 4: Simplify right side
    57,380.85x = 1,716,146,957.95
  5. Step 5: Solve for x
    x = 1,716,146,957.95/57,380.85
  6. Step 6: Final answer
    x = 29,908.01

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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.