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Finding the Fourth Proportional to 216,591.76, 324,669.48 and 90,301.90

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Solution

The fourth proportional to 216,591.76, 324,669.48 and 90,301.90 is: 135,361.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,591.76 : 324,669.48 = 90,301.90 : x
  2. Step 2: Convert to fraction form
    216,591.76/324,669.48 = 90,301.90/x
  3. Step 3: Cross multiply
    216,591.76x = 324,669.48 × 90,301.90
  4. Step 4: Simplify right side
    216,591.76x = 29,318,270,916.01
  5. Step 5: Solve for x
    x = 29,318,270,916.01/216,591.76
  6. Step 6: Final answer
    x = 135,361.89

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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.