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Finding the Fourth Proportional to 216,695.17, 324,821.17 and 74,497.78

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Solution

The fourth proportional to 216,695.17, 324,821.17 and 74,497.78 is: 111,670.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,695.17 : 324,821.17 = 74,497.78 : x
  2. Step 2: Convert to fraction form
    216,695.17/324,821.17 = 74,497.78/x
  3. Step 3: Cross multiply
    216,695.17x = 324,821.17 × 74,497.78
  4. Step 4: Simplify right side
    216,695.17x = 24,198,456,062.00
  5. Step 5: Solve for x
    x = 24,198,456,062.00/216,695.17
  6. Step 6: Final answer
    x = 111,670.49

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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.