Home / 78,132.24-117,198-18,967.68

Finding the Fourth Proportional to 78,132.24, 117,198 and 18,967.68

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Solution

The fourth proportional to 78,132.24, 117,198 and 18,967.68 is: 28,451.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.24 : 117,198 = 18,967.68 : x
  2. Step 2: Convert to fraction form
    78,132.24/117,198 = 18,967.68/x
  3. Step 3: Cross multiply
    78,132.24x = 117,198 × 18,967.68
  4. Step 4: Simplify right side
    78,132.24x = 2,222,974,160.64
  5. Step 5: Solve for x
    x = 2,222,974,160.64/78,132.24
  6. Step 6: Final answer
    x = 28,451.43

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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.