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Finding the Fourth Proportional to 90,900.32, 136,357.76 and 31,734.68

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Solution

The fourth proportional to 90,900.32, 136,357.76 and 31,734.68 is: 47,604.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,900.32 : 136,357.76 = 31,734.68 : x
  2. Step 2: Convert to fraction form
    90,900.32/136,357.76 = 31,734.68/x
  3. Step 3: Cross multiply
    90,900.32x = 136,357.76 × 31,734.68
  4. Step 4: Simplify right side
    90,900.32x = 4,327,269,879.12
  5. Step 5: Solve for x
    x = 4,327,269,879.12/90,900.32
  6. Step 6: Final answer
    x = 47,604.56

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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.