Home / 78,218.11-117,256.96-28,286.47

Finding the Fourth Proportional to 78,218.11, 117,256.96 and 28,286.47

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Solution

The fourth proportional to 78,218.11, 117,256.96 and 28,286.47 is: 42,404.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,218.11 : 117,256.96 = 28,286.47 : x
  2. Step 2: Convert to fraction form
    78,218.11/117,256.96 = 28,286.47/x
  3. Step 3: Cross multiply
    78,218.11x = 117,256.96 × 28,286.47
  4. Step 4: Simplify right side
    78,218.11x = 3,316,785,481.33
  5. Step 5: Solve for x
    x = 3,316,785,481.33/78,218.11
  6. Step 6: Final answer
    x = 42,404.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.