Home / 78,721.41-108,634.66-42,910.64

Finding the Fourth Proportional to 78,721.41, 108,634.66 and 42,910.64

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Solution

The fourth proportional to 78,721.41, 108,634.66 and 42,910.64 is: 59,216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,721.41 : 108,634.66 = 42,910.64 : x
  2. Step 2: Convert to fraction form
    78,721.41/108,634.66 = 42,910.64/x
  3. Step 3: Cross multiply
    78,721.41x = 108,634.66 × 42,910.64
  4. Step 4: Simplify right side
    78,721.41x = 4,661,582,786.78
  5. Step 5: Solve for x
    x = 4,661,582,786.78/78,721.41
  6. Step 6: Final answer
    x = 59,216.20

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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.