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Finding the Fourth Proportional to 90,071.87, 135,087.24 and 33,917.90

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Solution

The fourth proportional to 90,071.87, 135,087.24 and 33,917.90 is: 50,869.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,071.87 : 135,087.24 = 33,917.90 : x
  2. Step 2: Convert to fraction form
    90,071.87/135,087.24 = 33,917.90/x
  3. Step 3: Cross multiply
    90,071.87x = 135,087.24 × 33,917.90
  4. Step 4: Simplify right side
    90,071.87x = 4,581,875,497.60
  5. Step 5: Solve for x
    x = 4,581,875,497.60/90,071.87
  6. Step 6: Final answer
    x = 50,869.11

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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.