Home / 78,156.88-117,234.29-18,992.36

Finding the Fourth Proportional to 78,156.88, 117,234.29 and 18,992.36

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Solution

The fourth proportional to 78,156.88, 117,234.29 and 18,992.36 is: 28,488.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.88 : 117,234.29 = 18,992.36 : x
  2. Step 2: Convert to fraction form
    78,156.88/117,234.29 = 18,992.36/x
  3. Step 3: Cross multiply
    78,156.88x = 117,234.29 × 18,992.36
  4. Step 4: Simplify right side
    78,156.88x = 2,226,556,180.59
  5. Step 5: Solve for x
    x = 2,226,556,180.59/78,156.88
  6. Step 6: Final answer
    x = 28,488.29

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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.