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Finding the Fourth Proportional to 90,376.40, 135,629.40 and 50,891.60

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Solution

The fourth proportional to 90,376.40, 135,629.40 and 50,891.60 is: 76,373.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,376.40 : 135,629.40 = 50,891.60 : x
  2. Step 2: Convert to fraction form
    90,376.40/135,629.40 = 50,891.60/x
  3. Step 3: Cross multiply
    90,376.40x = 135,629.40 × 50,891.60
  4. Step 4: Simplify right side
    90,376.40x = 6,902,397,173.04
  5. Step 5: Solve for x
    x = 6,902,397,173.04/90,376.40
  6. Step 6: Final answer
    x = 76,373.89

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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.