Home / 67,172.91-100,724.59-19,781.83

Finding the Fourth Proportional to 67,172.91, 100,724.59 and 19,781.83

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Solution

The fourth proportional to 67,172.91, 100,724.59 and 19,781.83 is: 29,662.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,172.91 : 100,724.59 = 19,781.83 : x
  2. Step 2: Convert to fraction form
    67,172.91/100,724.59 = 19,781.83/x
  3. Step 3: Cross multiply
    67,172.91x = 100,724.59 × 19,781.83
  4. Step 4: Simplify right side
    67,172.91x = 1,992,516,716.20
  5. Step 5: Solve for x
    x = 1,992,516,716.20/67,172.91
  6. Step 6: Final answer
    x = 29,662.50

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1.5x scale

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.