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Finding the Fourth Proportional to 90,425.40, 135,702.90 and 50,940.60

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Solution

The fourth proportional to 90,425.40, 135,702.90 and 50,940.60 is: 76,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,425.40 : 135,702.90 = 50,940.60 : x
  2. Step 2: Convert to fraction form
    90,425.40/135,702.90 = 50,940.60/x
  3. Step 3: Cross multiply
    90,425.40x = 135,702.90 × 50,940.60
  4. Step 4: Simplify right side
    90,425.40x = 6,912,787,147.74
  5. Step 5: Solve for x
    x = 6,912,787,147.74/90,425.40
  6. Step 6: Final answer
    x = 76,447.40

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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.