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Finding the Fourth Proportional to 81,904.80, 123,099.56 and 67,955.32

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Solution

The fourth proportional to 81,904.80, 123,099.56 and 67,955.32 is: 102,134.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,904.80 : 123,099.56 = 67,955.32 : x
  2. Step 2: Convert to fraction form
    81,904.80/123,099.56 = 67,955.32/x
  3. Step 3: Cross multiply
    81,904.80x = 123,099.56 × 67,955.32
  4. Step 4: Simplify right side
    81,904.80x = 8,365,269,991.66
  5. Step 5: Solve for x
    x = 8,365,269,991.66/81,904.80
  6. Step 6: Final answer
    x = 102,134.06

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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.