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Finding the Fourth Proportional to 67,661.91, 101,465.11 and 20,260.30

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Solution

The fourth proportional to 67,661.91, 101,465.11 and 20,260.30 is: 30,382.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,661.91 : 101,465.11 = 20,260.30 : x
  2. Step 2: Convert to fraction form
    67,661.91/101,465.11 = 20,260.30/x
  3. Step 3: Cross multiply
    67,661.91x = 101,465.11 × 20,260.30
  4. Step 4: Simplify right side
    67,661.91x = 2,055,713,568.13
  5. Step 5: Solve for x
    x = 2,055,713,568.13/67,661.91
  6. Step 6: Final answer
    x = 30,382.14

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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.