Home / 128,431.25-177,231.11-71,067.11

Finding the Fourth Proportional to 128,431.25, 177,231.11 and 71,067.11

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Solution

The fourth proportional to 128,431.25, 177,231.11 and 71,067.11 is: 98,070.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,431.25 : 177,231.11 = 71,067.11 : x
  2. Step 2: Convert to fraction form
    128,431.25/177,231.11 = 71,067.11/x
  3. Step 3: Cross multiply
    128,431.25x = 177,231.11 × 71,067.11
  4. Step 4: Simplify right side
    128,431.25x = 12,595,301,548.30
  5. Step 5: Solve for x
    x = 12,595,301,548.30/128,431.25
  6. Step 6: Final answer
    x = 98,070.38

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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.