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Finding the Fourth Proportional to 90,100.40, 135,247.80 and 50,734.40

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Solution

The fourth proportional to 90,100.40, 135,247.80 and 50,734.40 is: 76,156.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,100.40 : 135,247.80 = 50,734.40 : x
  2. Step 2: Convert to fraction form
    90,100.40/135,247.80 = 50,734.40/x
  3. Step 3: Cross multiply
    90,100.40x = 135,247.80 × 50,734.40
  4. Step 4: Simplify right side
    90,100.40x = 6,861,715,984.32
  5. Step 5: Solve for x
    x = 6,861,715,984.32/90,100.40
  6. Step 6: Final answer
    x = 76,156.33

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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.