Home / 100,208.82-138,310.86-62,475.78

Finding the Fourth Proportional to 100,208.82, 138,310.86 and 62,475.78

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Solution

The fourth proportional to 100,208.82, 138,310.86 and 62,475.78 is: 86,230.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,208.82 : 138,310.86 = 62,475.78 : x
  2. Step 2: Convert to fraction form
    100,208.82/138,310.86 = 62,475.78/x
  3. Step 3: Cross multiply
    100,208.82x = 138,310.86 × 62,475.78
  4. Step 4: Simplify right side
    100,208.82x = 8,641,078,860.97
  5. Step 5: Solve for x
    x = 8,641,078,860.97/100,208.82
  6. Step 6: Final answer
    x = 86,230.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.