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Finding the Fourth Proportional to 90,409.78, 135,604.23 and 23,855.23

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Solution

The fourth proportional to 90,409.78, 135,604.23 and 23,855.23 is: 35,780.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,409.78 : 135,604.23 = 23,855.23 : x
  2. Step 2: Convert to fraction form
    90,409.78/135,604.23 = 23,855.23/x
  3. Step 3: Cross multiply
    90,409.78x = 135,604.23 × 23,855.23
  4. Step 4: Simplify right side
    90,409.78x = 3,234,870,095.62
  5. Step 5: Solve for x
    x = 3,234,870,095.62/90,409.78
  6. Step 6: Final answer
    x = 35,780.09

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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.