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Finding the Fourth Proportional to 216,357.12, 324,566.39 and 66,609.86

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Solution

The fourth proportional to 216,357.12, 324,566.39 and 66,609.86 is: 99,924.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,357.12 : 324,566.39 = 66,609.86 : x
  2. Step 2: Convert to fraction form
    216,357.12/324,566.39 = 66,609.86/x
  3. Step 3: Cross multiply
    216,357.12x = 324,566.39 × 66,609.86
  4. Step 4: Simplify right side
    216,357.12x = 21,619,320,342.30
  5. Step 5: Solve for x
    x = 21,619,320,342.30/216,357.12
  6. Step 6: Final answer
    x = 99,924.24

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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.