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Finding the Fourth Proportional to 120,991.84, 181,330.06 and 61,777.60

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Solution

The fourth proportional to 120,991.84, 181,330.06 and 61,777.60 is: 92,585.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,991.84 : 181,330.06 = 61,777.60 : x
  2. Step 2: Convert to fraction form
    120,991.84/181,330.06 = 61,777.60/x
  3. Step 3: Cross multiply
    120,991.84x = 181,330.06 × 61,777.60
  4. Step 4: Simplify right side
    120,991.84x = 11,202,135,914.66
  5. Step 5: Solve for x
    x = 11,202,135,914.66/120,991.84
  6. Step 6: Final answer
    x = 92,585.88

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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.