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Finding the Fourth Proportional to 216,358.62, 324,568.65 and 66,611.36

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Solution

The fourth proportional to 216,358.62, 324,568.65 and 66,611.36 is: 99,926.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,358.62 : 324,568.65 = 66,611.36 : x
  2. Step 2: Convert to fraction form
    216,358.62/324,568.65 = 66,611.36/x
  3. Step 3: Cross multiply
    216,358.62x = 324,568.65 × 66,611.36
  4. Step 4: Simplify right side
    216,358.62x = 21,619,957,567.02
  5. Step 5: Solve for x
    x = 21,619,957,567.02/216,358.62
  6. Step 6: Final answer
    x = 99,926.49

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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.