Home / 90,640.14-135,963.63-34,469.78

Finding the Fourth Proportional to 90,640.14, 135,963.63 and 34,469.78

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Solution

The fourth proportional to 90,640.14, 135,963.63 and 34,469.78 is: 51,705.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640.14 : 135,963.63 = 34,469.78 : x
  2. Step 2: Convert to fraction form
    90,640.14/135,963.63 = 34,469.78/x
  3. Step 3: Cross multiply
    90,640.14x = 135,963.63 × 34,469.78
  4. Step 4: Simplify right side
    90,640.14x = 4,686,636,414.10
  5. Step 5: Solve for x
    x = 4,686,636,414.10/90,640.14
  6. Step 6: Final answer
    x = 51,705.97

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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.