Home / 78,078.12-117,093.02-28,151.79

Finding the Fourth Proportional to 78,078.12, 117,093.02 and 28,151.79

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Solution

The fourth proportional to 78,078.12, 117,093.02 and 28,151.79 is: 42,218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.12 : 117,093.02 = 28,151.79 : x
  2. Step 2: Convert to fraction form
    78,078.12/117,093.02 = 28,151.79/x
  3. Step 3: Cross multiply
    78,078.12x = 117,093.02 × 28,151.79
  4. Step 4: Simplify right side
    78,078.12x = 3,296,377,968.75
  5. Step 5: Solve for x
    x = 3,296,377,968.75/78,078.12
  6. Step 6: Final answer
    x = 42,218.97

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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.