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Finding the Fourth Proportional to 78,562.45, 117,843.91 and 19,398.12

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Solution

The fourth proportional to 78,562.45, 117,843.91 and 19,398.12 is: 29,097.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,562.45 : 117,843.91 = 19,398.12 : x
  2. Step 2: Convert to fraction form
    78,562.45/117,843.91 = 19,398.12/x
  3. Step 3: Cross multiply
    78,562.45x = 117,843.91 × 19,398.12
  4. Step 4: Simplify right side
    78,562.45x = 2,285,950,307.45
  5. Step 5: Solve for x
    x = 2,285,950,307.45/78,562.45
  6. Step 6: Final answer
    x = 29,097.24

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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.