Home / 90,481.08-135,721.62-28,139.16

Finding the Fourth Proportional to 90,481.08, 135,721.62 and 28,139.16

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Solution

The fourth proportional to 90,481.08, 135,721.62 and 28,139.16 is: 42,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,481.08 : 135,721.62 = 28,139.16 : x
  2. Step 2: Convert to fraction form
    90,481.08/135,721.62 = 28,139.16/x
  3. Step 3: Cross multiply
    90,481.08x = 135,721.62 × 28,139.16
  4. Step 4: Simplify right side
    90,481.08x = 3,819,092,380.64
  5. Step 5: Solve for x
    x = 3,819,092,380.64/90,481.08
  6. Step 6: Final answer
    x = 42,208.74

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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.