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Finding the Fourth Proportional to 216,691.02, 325,045.04 and 66,917.97

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Solution

The fourth proportional to 216,691.02, 325,045.04 and 66,917.97 is: 100,379.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,691.02 : 325,045.04 = 66,917.97 : x
  2. Step 2: Convert to fraction form
    216,691.02/325,045.04 = 66,917.97/x
  3. Step 3: Cross multiply
    216,691.02x = 325,045.04 × 66,917.97
  4. Step 4: Simplify right side
    216,691.02x = 21,751,353,900.78
  5. Step 5: Solve for x
    x = 21,751,353,900.78/216,691.02
  6. Step 6: Final answer
    x = 100,379.58

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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.