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Finding the Fourth Proportional to 78,879.22, 108,968.48 and 68,250.40

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Solution

The fourth proportional to 78,879.22, 108,968.48 and 68,250.40 is: 94,285.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,879.22 : 108,968.48 = 68,250.40 : x
  2. Step 2: Convert to fraction form
    78,879.22/108,968.48 = 68,250.40/x
  3. Step 3: Cross multiply
    78,879.22x = 108,968.48 × 68,250.40
  4. Step 4: Simplify right side
    78,879.22x = 7,437,142,347.39
  5. Step 5: Solve for x
    x = 7,437,142,347.39/78,879.22
  6. Step 6: Final answer
    x = 94,285.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.