Home / 87,979.38-121,383-49,735.23

Finding the Fourth Proportional to 87,979.38, 121,383 and 49,735.23

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Solution

The fourth proportional to 87,979.38, 121,383 and 49,735.23 is: 68,618.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,979.38 : 121,383 = 49,735.23 : x
  2. Step 2: Convert to fraction form
    87,979.38/121,383 = 49,735.23/x
  3. Step 3: Cross multiply
    87,979.38x = 121,383 × 49,735.23
  4. Step 4: Simplify right side
    87,979.38x = 6,037,011,423.09
  5. Step 5: Solve for x
    x = 6,037,011,423.09/87,979.38
  6. Step 6: Final answer
    x = 68,618.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.