Home / 78,221.45-117,051.87-67,727.66

Finding the Fourth Proportional to 78,221.45, 117,051.87 and 67,727.66

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Solution

The fourth proportional to 78,221.45, 117,051.87 and 67,727.66 is: 101,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,221.45 : 117,051.87 = 67,727.66 : x
  2. Step 2: Convert to fraction form
    78,221.45/117,051.87 = 67,727.66/x
  3. Step 3: Cross multiply
    78,221.45x = 117,051.87 × 67,727.66
  4. Step 4: Simplify right side
    78,221.45x = 7,927,649,253.72
  5. Step 5: Solve for x
    x = 7,927,649,253.72/78,221.45
  6. Step 6: Final answer
    x = 101,348.79

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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.