Home / 100,108.02-138,179.82-57,694.80

Finding the Fourth Proportional to 100,108.02, 138,179.82 and 57,694.80

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Solution

The fourth proportional to 100,108.02, 138,179.82 and 57,694.80 is: 79,636.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,108.02 : 138,179.82 = 57,694.80 : x
  2. Step 2: Convert to fraction form
    100,108.02/138,179.82 = 57,694.80/x
  3. Step 3: Cross multiply
    100,108.02x = 138,179.82 × 57,694.80
  4. Step 4: Simplify right side
    100,108.02x = 7,972,257,078.94
  5. Step 5: Solve for x
    x = 7,972,257,078.94/100,108.02
  6. Step 6: Final answer
    x = 79,636.55

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1.5x scale

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.