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Finding the Fourth Proportional to 99,992, 137,991.84 and 55,282.88

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Solution

The fourth proportional to 99,992, 137,991.84 and 55,282.88 is: 76,291.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,992 : 137,991.84 = 55,282.88 : x
  2. Step 2: Convert to fraction form
    99,992/137,991.84 = 55,282.88/x
  3. Step 3: Cross multiply
    99,992x = 137,991.84 × 55,282.88
  4. Step 4: Simplify right side
    99,992x = 7,628,586,331.70
  5. Step 5: Solve for x
    x = 7,628,586,331.70/99,992
  6. Step 6: Final answer
    x = 76,291.97

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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.