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Finding the Fourth Proportional to 90,387.84, 135,450.24 and 43,585.92

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Solution

The fourth proportional to 90,387.84, 135,450.24 and 43,585.92 is: 65,315.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,387.84 : 135,450.24 = 43,585.92 : x
  2. Step 2: Convert to fraction form
    90,387.84/135,450.24 = 43,585.92/x
  3. Step 3: Cross multiply
    90,387.84x = 135,450.24 × 43,585.92
  4. Step 4: Simplify right side
    90,387.84x = 5,903,723,324.62
  5. Step 5: Solve for x
    x = 5,903,723,324.62/90,387.84
  6. Step 6: Final answer
    x = 65,315.46

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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.