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Finding the Fourth Proportional to 90,422.40, 135,698.40 and 50,937.60

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Solution

The fourth proportional to 90,422.40, 135,698.40 and 50,937.60 is: 76,442.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,422.40 : 135,698.40 = 50,937.60 : x
  2. Step 2: Convert to fraction form
    90,422.40/135,698.40 = 50,937.60/x
  3. Step 3: Cross multiply
    90,422.40x = 135,698.40 × 50,937.60
  4. Step 4: Simplify right side
    90,422.40x = 6,912,150,819.84
  5. Step 5: Solve for x
    x = 6,912,150,819.84/90,422.40
  6. Step 6: Final answer
    x = 76,442.90

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1.5x scale

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.