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Finding the Fourth Proportional to 193,990.76, 291,057.21 and 81,699.24

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Solution

The fourth proportional to 193,990.76, 291,057.21 and 81,699.24 is: 122,578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,990.76 : 291,057.21 = 81,699.24 : x
  2. Step 2: Convert to fraction form
    193,990.76/291,057.21 = 81,699.24/x
  3. Step 3: Cross multiply
    193,990.76x = 291,057.21 × 81,699.24
  4. Step 4: Simplify right side
    193,990.76x = 23,779,152,853.52
  5. Step 5: Solve for x
    x = 23,779,152,853.52/193,990.76
  6. Step 6: Final answer
    x = 122,578.79

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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.