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Finding the Fourth Proportional to 87,642.46, 121,004.99 and 51,843.97

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Solution

The fourth proportional to 87,642.46, 121,004.99 and 51,843.97 is: 71,579.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,642.46 : 121,004.99 = 51,843.97 : x
  2. Step 2: Convert to fraction form
    87,642.46/121,004.99 = 51,843.97/x
  3. Step 3: Cross multiply
    87,642.46x = 121,004.99 × 51,843.97
  4. Step 4: Simplify right side
    87,642.46x = 6,273,379,071.41
  5. Step 5: Solve for x
    x = 6,273,379,071.41/87,642.46
  6. Step 6: Final answer
    x = 71,579.22

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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.