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Finding the Fourth Proportional to 216,617.60, 324,811.20 and 91,817.60

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Solution

The fourth proportional to 216,617.60, 324,811.20 and 91,817.60 is: 137,677.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,617.60 : 324,811.20 = 91,817.60 : x
  2. Step 2: Convert to fraction form
    216,617.60/324,811.20 = 91,817.60/x
  3. Step 3: Cross multiply
    216,617.60x = 324,811.20 × 91,817.60
  4. Step 4: Simplify right side
    216,617.60x = 29,823,384,837.12
  5. Step 5: Solve for x
    x = 29,823,384,837.12/216,617.60
  6. Step 6: Final answer
    x = 137,677.57

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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.