Home / 78,078.20-117,118.27-27,478.74

Finding the Fourth Proportional to 78,078.20, 117,118.27 and 27,478.74

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Solution

The fourth proportional to 78,078.20, 117,118.27 and 27,478.74 is: 41,218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.20 : 117,118.27 = 27,478.74 : x
  2. Step 2: Convert to fraction form
    78,078.20/117,118.27 = 27,478.74/x
  3. Step 3: Cross multiply
    78,078.20x = 117,118.27 × 27,478.74
  4. Step 4: Simplify right side
    78,078.20x = 3,218,262,964.12
  5. Step 5: Solve for x
    x = 3,218,262,964.12/78,078.20
  6. Step 6: Final answer
    x = 41,218.46

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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.