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Finding the Fourth Proportional to 216,568.08, 324,753.72 and 66,780.48

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Solution

The fourth proportional to 216,568.08, 324,753.72 and 66,780.48 is: 100,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,568.08 : 324,753.72 = 66,780.48 : x
  2. Step 2: Convert to fraction form
    216,568.08/324,753.72 = 66,780.48/x
  3. Step 3: Cross multiply
    216,568.08x = 324,753.72 × 66,780.48
  4. Step 4: Simplify right side
    216,568.08x = 21,687,209,303.39
  5. Step 5: Solve for x
    x = 21,687,209,303.39/216,568.08
  6. Step 6: Final answer
    x = 100,140.38

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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.