Home / 90,489.12-135,733.68-28,159.62

Finding the Fourth Proportional to 90,489.12, 135,733.68 and 28,159.62

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Solution

The fourth proportional to 90,489.12, 135,733.68 and 28,159.62 is: 42,239.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,489.12 : 135,733.68 = 28,159.62 : x
  2. Step 2: Convert to fraction form
    90,489.12/135,733.68 = 28,159.62/x
  3. Step 3: Cross multiply
    90,489.12x = 135,733.68 × 28,159.62
  4. Step 4: Simplify right side
    90,489.12x = 3,822,208,850.00
  5. Step 5: Solve for x
    x = 3,822,208,850.00/90,489.12
  6. Step 6: Final answer
    x = 42,239.43

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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.