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Finding the Fourth Proportional to 90,376.64, 135,314.56 and 68,122.56

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Solution

The fourth proportional to 90,376.64, 135,314.56 and 68,122.56 is: 101,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,376.64 : 135,314.56 = 68,122.56 : x
  2. Step 2: Convert to fraction form
    90,376.64/135,314.56 = 68,122.56/x
  3. Step 3: Cross multiply
    90,376.64x = 135,314.56 × 68,122.56
  4. Step 4: Simplify right side
    90,376.64x = 9,217,974,232.47
  5. Step 5: Solve for x
    x = 9,217,974,232.47/90,376.64
  6. Step 6: Final answer
    x = 101,995.10

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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.