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Finding the Fourth Proportional to 73,221.95, 109,707.53 and 39,965.36

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Solution

The fourth proportional to 73,221.95, 109,707.53 and 39,965.36 is: 59,879.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,221.95 : 109,707.53 = 39,965.36 : x
  2. Step 2: Convert to fraction form
    73,221.95/109,707.53 = 39,965.36/x
  3. Step 3: Cross multiply
    73,221.95x = 109,707.53 × 39,965.36
  4. Step 4: Simplify right side
    73,221.95x = 4,384,500,182.80
  5. Step 5: Solve for x
    x = 4,384,500,182.80/73,221.95
  6. Step 6: Final answer
    x = 59,879.59

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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.