Home / 90,640.24-135,979.78-38,019.40

Finding the Fourth Proportional to 90,640.24, 135,979.78 and 38,019.40

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Solution

The fourth proportional to 90,640.24, 135,979.78 and 38,019.40 is: 57,037.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,640.24 : 135,979.78 = 38,019.40 : x
  2. Step 2: Convert to fraction form
    90,640.24/135,979.78 = 38,019.40/x
  3. Step 3: Cross multiply
    90,640.24x = 135,979.78 × 38,019.40
  4. Step 4: Simplify right side
    90,640.24x = 5,169,869,647.73
  5. Step 5: Solve for x
    x = 5,169,869,647.73/90,640.24
  6. Step 6: Final answer
    x = 57,037.25

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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.