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Finding the Fourth Proportional to 216,633.75, 324,920.56 and 66,878.97

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Solution

The fourth proportional to 216,633.75, 324,920.56 and 66,878.97 is: 100,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,633.75 : 324,920.56 = 66,878.97 : x
  2. Step 2: Convert to fraction form
    216,633.75/324,920.56 = 66,878.97/x
  3. Step 3: Cross multiply
    216,633.75x = 324,920.56 × 66,878.97
  4. Step 4: Simplify right side
    216,633.75x = 21,730,352,384.62
  5. Step 5: Solve for x
    x = 21,730,352,384.62/216,633.75
  6. Step 6: Final answer
    x = 100,309.17

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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.