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Finding the Fourth Proportional to 73,109.81, 109,708.43 and 67,161.17

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Solution

The fourth proportional to 73,109.81, 109,708.43 and 67,161.17 is: 100,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,109.81 : 109,708.43 = 67,161.17 : x
  2. Step 2: Convert to fraction form
    73,109.81/109,708.43 = 67,161.17/x
  3. Step 3: Cross multiply
    73,109.81x = 109,708.43 × 67,161.17
  4. Step 4: Simplify right side
    73,109.81x = 7,368,145,633.32
  5. Step 5: Solve for x
    x = 7,368,145,633.32/73,109.81
  6. Step 6: Final answer
    x = 100,781.91

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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.