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Finding the Fourth Proportional to 90,611.66, 135,933.29 and 34,456.59

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Solution

The fourth proportional to 90,611.66, 135,933.29 and 34,456.59 is: 51,690.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,611.66 : 135,933.29 = 34,456.59 : x
  2. Step 2: Convert to fraction form
    90,611.66/135,933.29 = 34,456.59/x
  3. Step 3: Cross multiply
    90,611.66x = 135,933.29 × 34,456.59
  4. Step 4: Simplify right side
    90,611.66x = 4,683,797,640.88
  5. Step 5: Solve for x
    x = 4,683,797,640.88/90,611.66
  6. Step 6: Final answer
    x = 51,690.89

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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.