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Finding the Fourth Proportional to 67,091, 100,639.92 and 17,171.51

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Solution

The fourth proportional to 67,091, 100,639.92 and 17,171.51 is: 25,758.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,091 : 100,639.92 = 17,171.51 : x
  2. Step 2: Convert to fraction form
    67,091/100,639.92 = 17,171.51/x
  3. Step 3: Cross multiply
    67,091x = 100,639.92 × 17,171.51
  4. Step 4: Simplify right side
    67,091x = 1,728,139,392.68
  5. Step 5: Solve for x
    x = 1,728,139,392.68/67,091
  6. Step 6: Final answer
    x = 25,758.14

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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.