Home / 78,126.22-117,189.39-18,961.95

Finding the Fourth Proportional to 78,126.22, 117,189.39 and 18,961.95

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Solution

The fourth proportional to 78,126.22, 117,189.39 and 18,961.95 is: 28,442.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,126.22 : 117,189.39 = 18,961.95 : x
  2. Step 2: Convert to fraction form
    78,126.22/117,189.39 = 18,961.95/x
  3. Step 3: Cross multiply
    78,126.22x = 117,189.39 × 18,961.95
  4. Step 4: Simplify right side
    78,126.22x = 2,222,139,353.71
  5. Step 5: Solve for x
    x = 2,222,139,353.71/78,126.22
  6. Step 6: Final answer
    x = 28,442.94

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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.