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Finding the Fourth Proportional to 216,690.77, 325,044.66 and 66,917.72

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Solution

The fourth proportional to 216,690.77, 325,044.66 and 66,917.72 is: 100,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,690.77 : 325,044.66 = 66,917.72 : x
  2. Step 2: Convert to fraction form
    216,690.77/325,044.66 = 66,917.72/x
  3. Step 3: Cross multiply
    216,690.77x = 325,044.66 × 66,917.72
  4. Step 4: Simplify right side
    216,690.77x = 21,751,247,545.38
  5. Step 5: Solve for x
    x = 21,751,247,545.38/216,690.77
  6. Step 6: Final answer
    x = 100,379.21

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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.