Home / 90,881.11-136,383.95-31,716.78

Finding the Fourth Proportional to 90,881.11, 136,383.95 and 31,716.78

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Solution

The fourth proportional to 90,881.11, 136,383.95 and 31,716.78 is: 47,596.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,881.11 : 136,383.95 = 31,716.78 : x
  2. Step 2: Convert to fraction form
    90,881.11/136,383.95 = 31,716.78/x
  3. Step 3: Cross multiply
    90,881.11x = 136,383.95 × 31,716.78
  4. Step 4: Simplify right side
    90,881.11x = 4,325,659,737.68
  5. Step 5: Solve for x
    x = 4,325,659,737.68/90,881.11
  6. Step 6: Final answer
    x = 47,596.91

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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.