Home / 100,067.58-138,125.43-66,106.22

Finding the Fourth Proportional to 100,067.58, 138,125.43 and 66,106.22

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Solution

The fourth proportional to 100,067.58, 138,125.43 and 66,106.22 is: 91,247.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,067.58 : 138,125.43 = 66,106.22 : x
  2. Step 2: Convert to fraction form
    100,067.58/138,125.43 = 66,106.22/x
  3. Step 3: Cross multiply
    100,067.58x = 138,125.43 × 66,106.22
  4. Step 4: Simplify right side
    100,067.58x = 9,130,949,372.55
  5. Step 5: Solve for x
    x = 9,130,949,372.55/100,067.58
  6. Step 6: Final answer
    x = 91,247.83

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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.