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Finding the Fourth Proportional to 216,219.78, 324,360.65 and 66,472.61

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Solution

The fourth proportional to 216,219.78, 324,360.65 and 66,472.61 is: 99,718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,219.78 : 324,360.65 = 66,472.61 : x
  2. Step 2: Convert to fraction form
    216,219.78/324,360.65 = 66,472.61/x
  3. Step 3: Cross multiply
    216,219.78x = 324,360.65 × 66,472.61
  4. Step 4: Simplify right side
    216,219.78x = 21,561,097,531.17
  5. Step 5: Solve for x
    x = 21,561,097,531.17/216,219.78
  6. Step 6: Final answer
    x = 99,718.43

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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.