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Finding the Fourth Proportional to 216,287.75, 324,462.35 and 66,540.51

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Solution

The fourth proportional to 216,287.75, 324,462.35 and 66,540.51 is: 99,820.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,287.75 : 324,462.35 = 66,540.51 : x
  2. Step 2: Convert to fraction form
    216,287.75/324,462.35 = 66,540.51/x
  3. Step 3: Cross multiply
    216,287.75x = 324,462.35 × 66,540.51
  4. Step 4: Simplify right side
    216,287.75x = 21,589,890,411.15
  5. Step 5: Solve for x
    x = 21,589,890,411.15/216,287.75
  6. Step 6: Final answer
    x = 99,820.22

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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.