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Finding the Fourth Proportional to 109,599.86, 151,231.59 and 66,556.97

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Solution

The fourth proportional to 109,599.86, 151,231.59 and 66,556.97 is: 91,838.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,599.86 : 151,231.59 = 66,556.97 : x
  2. Step 2: Convert to fraction form
    109,599.86/151,231.59 = 66,556.97/x
  3. Step 3: Cross multiply
    109,599.86x = 151,231.59 × 66,556.97
  4. Step 4: Simplify right side
    109,599.86x = 10,065,515,392.94
  5. Step 5: Solve for x
    x = 10,065,515,392.94/109,599.86
  6. Step 6: Final answer
    x = 91,838.76

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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.