Home / 100,238.88-138,335.04-57,799.20

Finding the Fourth Proportional to 100,238.88, 138,335.04 and 57,799.20

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Solution

The fourth proportional to 100,238.88, 138,335.04 and 57,799.20 is: 79,766.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,238.88 : 138,335.04 = 57,799.20 : x
  2. Step 2: Convert to fraction form
    100,238.88/138,335.04 = 57,799.20/x
  3. Step 3: Cross multiply
    100,238.88x = 138,335.04 × 57,799.20
  4. Step 4: Simplify right side
    100,238.88x = 7,995,654,643.97
  5. Step 5: Solve for x
    x = 7,995,654,643.97/100,238.88
  6. Step 6: Final answer
    x = 79,766.00

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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.