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Finding the Fourth Proportional to 99,261.99, 136,980.92 and 53,939.25

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Solution

The fourth proportional to 99,261.99, 136,980.92 and 53,939.25 is: 74,435.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,261.99 : 136,980.92 = 53,939.25 : x
  2. Step 2: Convert to fraction form
    99,261.99/136,980.92 = 53,939.25/x
  3. Step 3: Cross multiply
    99,261.99x = 136,980.92 × 53,939.25
  4. Step 4: Simplify right side
    99,261.99x = 7,388,648,223.96
  5. Step 5: Solve for x
    x = 7,388,648,223.96/99,261.99
  6. Step 6: Final answer
    x = 74,435.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.