Home / 90,843.75-136,270.49-28,519.11

Finding the Fourth Proportional to 90,843.75, 136,270.49 and 28,519.11

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Solution

The fourth proportional to 90,843.75, 136,270.49 and 28,519.11 is: 42,780.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,843.75 : 136,270.49 = 28,519.11 : x
  2. Step 2: Convert to fraction form
    90,843.75/136,270.49 = 28,519.11/x
  3. Step 3: Cross multiply
    90,843.75x = 136,270.49 × 28,519.11
  4. Step 4: Simplify right side
    90,843.75x = 3,886,312,951.47
  5. Step 5: Solve for x
    x = 3,886,312,951.47/90,843.75
  6. Step 6: Final answer
    x = 42,780.19

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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.