Home / 100,713.24-138,987.36-55,393.20

Finding the Fourth Proportional to 100,713.24, 138,987.36 and 55,393.20

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Solution

The fourth proportional to 100,713.24, 138,987.36 and 55,393.20 is: 76,444.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,713.24 : 138,987.36 = 55,393.20 : x
  2. Step 2: Convert to fraction form
    100,713.24/138,987.36 = 55,393.20/x
  3. Step 3: Cross multiply
    100,713.24x = 138,987.36 × 55,393.20
  4. Step 4: Simplify right side
    100,713.24x = 7,698,954,629.95
  5. Step 5: Solve for x
    x = 7,698,954,629.95/100,713.24
  6. Step 6: Final answer
    x = 76,444.31

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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.