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Finding the Fourth Proportional to 90,429.68, 135,661.53 and 36,398.49

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Solution

The fourth proportional to 90,429.68, 135,661.53 and 36,398.49 is: 54,604.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,429.68 : 135,661.53 = 36,398.49 : x
  2. Step 2: Convert to fraction form
    90,429.68/135,661.53 = 36,398.49/x
  3. Step 3: Cross multiply
    90,429.68x = 135,661.53 × 36,398.49
  4. Step 4: Simplify right side
    90,429.68x = 4,937,874,661.10
  5. Step 5: Solve for x
    x = 4,937,874,661.10/90,429.68
  6. Step 6: Final answer
    x = 54,604.58

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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.