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Finding the Fourth Proportional to 67,059.81, 100,991.38 and 61,081.14

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Solution

The fourth proportional to 67,059.81, 100,991.38 and 61,081.14 is: 91,987.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,059.81 : 100,991.38 = 61,081.14 : x
  2. Step 2: Convert to fraction form
    67,059.81/100,991.38 = 61,081.14/x
  3. Step 3: Cross multiply
    67,059.81x = 100,991.38 × 61,081.14
  4. Step 4: Simplify right side
    67,059.81x = 6,168,668,467.87
  5. Step 5: Solve for x
    x = 6,168,668,467.87/67,059.81
  6. Step 6: Final answer
    x = 91,987.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.