Home / 78,511.35-117,749.31-22,350.21

Finding the Fourth Proportional to 78,511.35, 117,749.31 and 22,350.21

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Solution

The fourth proportional to 78,511.35, 117,749.31 and 22,350.21 is: 33,520.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,511.35 : 117,749.31 = 22,350.21 : x
  2. Step 2: Convert to fraction form
    78,511.35/117,749.31 = 22,350.21/x
  3. Step 3: Cross multiply
    78,511.35x = 117,749.31 × 22,350.21
  4. Step 4: Simplify right side
    78,511.35x = 2,631,721,805.86
  5. Step 5: Solve for x
    x = 2,631,721,805.86/78,511.35
  6. Step 6: Final answer
    x = 33,520.27

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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.