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Finding the Fourth Proportional to 216,463.14, 324,726.98 and 66,690.90

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Solution

The fourth proportional to 216,463.14, 324,726.98 and 66,690.90 is: 100,046.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,463.14 : 324,726.98 = 66,690.90 : x
  2. Step 2: Convert to fraction form
    216,463.14/324,726.98 = 66,690.90/x
  3. Step 3: Cross multiply
    216,463.14x = 324,726.98 × 66,690.90
  4. Step 4: Simplify right side
    216,463.14x = 21,656,334,217.03
  5. Step 5: Solve for x
    x = 21,656,334,217.03/216,463.14
  6. Step 6: Final answer
    x = 100,046.29

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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.