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Finding the Fourth Proportional to 90,793.36, 135,993.12 and 43,948

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Solution

The fourth proportional to 90,793.36, 135,993.12 and 43,948 is: 65,826.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,793.36 : 135,993.12 = 43,948 : x
  2. Step 2: Convert to fraction form
    90,793.36/135,993.12 = 43,948/x
  3. Step 3: Cross multiply
    90,793.36x = 135,993.12 × 43,948
  4. Step 4: Simplify right side
    90,793.36x = 5,976,625,637.76
  5. Step 5: Solve for x
    x = 5,976,625,637.76/90,793.36
  6. Step 6: Final answer
    x = 65,826.68

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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.