Home / 87,961.71-121,393.32-49,721.57

Finding the Fourth Proportional to 87,961.71, 121,393.32 and 49,721.57

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Solution

The fourth proportional to 87,961.71, 121,393.32 and 49,721.57 is: 68,619.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,961.71 : 121,393.32 = 49,721.57 : x
  2. Step 2: Convert to fraction form
    87,961.71/121,393.32 = 49,721.57/x
  3. Step 3: Cross multiply
    87,961.71x = 121,393.32 × 49,721.57
  4. Step 4: Simplify right side
    87,961.71x = 6,035,865,850.95
  5. Step 5: Solve for x
    x = 6,035,865,850.95/87,961.71
  6. Step 6: Final answer
    x = 68,619.24

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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.