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Finding the Fourth Proportional to 79,216.86, 118,542.15 and 68,809.50

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Solution

The fourth proportional to 79,216.86, 118,542.15 and 68,809.50 is: 102,968.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,216.86 : 118,542.15 = 68,809.50 : x
  2. Step 2: Convert to fraction form
    79,216.86/118,542.15 = 68,809.50/x
  3. Step 3: Cross multiply
    79,216.86x = 118,542.15 × 68,809.50
  4. Step 4: Simplify right side
    79,216.86x = 8,156,826,070.43
  5. Step 5: Solve for x
    x = 8,156,826,070.43/79,216.86
  6. Step 6: Final answer
    x = 102,968.31

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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.