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Finding the Fourth Proportional to 78,600.96, 117,400.96 and 67,539.84

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Solution

The fourth proportional to 78,600.96, 117,400.96 and 67,539.84 is: 100,879.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.96 : 117,400.96 = 67,539.84 : x
  2. Step 2: Convert to fraction form
    78,600.96/117,400.96 = 67,539.84/x
  3. Step 3: Cross multiply
    78,600.96x = 117,400.96 × 67,539.84
  4. Step 4: Simplify right side
    78,600.96x = 7,929,242,054.25
  5. Step 5: Solve for x
    x = 7,929,242,054.25/78,600.96
  6. Step 6: Final answer
    x = 100,879.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.