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Finding the Fourth Proportional to 79,003.78, 108,960.26 and 56,335.53

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Solution

The fourth proportional to 79,003.78, 108,960.26 and 56,335.53 is: 77,696.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,003.78 : 108,960.26 = 56,335.53 : x
  2. Step 2: Convert to fraction form
    79,003.78/108,960.26 = 56,335.53/x
  3. Step 3: Cross multiply
    79,003.78x = 108,960.26 × 56,335.53
  4. Step 4: Simplify right side
    79,003.78x = 6,138,333,451.24
  5. Step 5: Solve for x
    x = 6,138,333,451.24/79,003.78
  6. Step 6: Final answer
    x = 77,696.71

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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.