Home / 87,868.16-121,257.89-47,581.80

Finding the Fourth Proportional to 87,868.16, 121,257.89 and 47,581.80

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Solution

The fourth proportional to 87,868.16, 121,257.89 and 47,581.80 is: 65,662.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,868.16 : 121,257.89 = 47,581.80 : x
  2. Step 2: Convert to fraction form
    87,868.16/121,257.89 = 47,581.80/x
  3. Step 3: Cross multiply
    87,868.16x = 121,257.89 × 47,581.80
  4. Step 4: Simplify right side
    87,868.16x = 5,769,668,022.38
  5. Step 5: Solve for x
    x = 5,769,668,022.38/87,868.16
  6. Step 6: Final answer
    x = 65,662.79

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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.