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Finding the Fourth Proportional to 90,793.20, 135,930.60 and 55,801.20

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Solution

The fourth proportional to 90,793.20, 135,930.60 and 55,801.20 is: 83,542.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,793.20 : 135,930.60 = 55,801.20 : x
  2. Step 2: Convert to fraction form
    90,793.20/135,930.60 = 55,801.20/x
  3. Step 3: Cross multiply
    90,793.20x = 135,930.60 × 55,801.20
  4. Step 4: Simplify right side
    90,793.20x = 7,585,090,596.72
  5. Step 5: Solve for x
    x = 7,585,090,596.72/90,793.20
  6. Step 6: Final answer
    x = 83,542.50

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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.