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Finding the Fourth Proportional to 216,972.30, 325,400.85 and 67,212.30

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Solution

The fourth proportional to 216,972.30, 325,400.85 and 67,212.30 is: 100,800.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,972.30 : 325,400.85 = 67,212.30 : x
  2. Step 2: Convert to fraction form
    216,972.30/325,400.85 = 67,212.30/x
  3. Step 3: Cross multiply
    216,972.30x = 325,400.85 × 67,212.30
  4. Step 4: Simplify right side
    216,972.30x = 21,870,939,550.46
  5. Step 5: Solve for x
    x = 21,870,939,550.46/216,972.30
  6. Step 6: Final answer
    x = 100,800.61

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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.