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Finding the Fourth Proportional to 57,398.62, 86,111.82 and 19,953.28

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Solution

The fourth proportional to 57,398.62, 86,111.82 and 19,953.28 is: 29,934.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,398.62 : 86,111.82 = 19,953.28 : x
  2. Step 2: Convert to fraction form
    57,398.62/86,111.82 = 19,953.28/x
  3. Step 3: Cross multiply
    57,398.62x = 86,111.82 × 19,953.28
  4. Step 4: Simplify right side
    57,398.62x = 1,718,213,255.77
  5. Step 5: Solve for x
    x = 1,718,213,255.77/57,398.62
  6. Step 6: Final answer
    x = 29,934.75

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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.