Home / 128,917.01-177,902.05-71,556.16

Finding the Fourth Proportional to 128,917.01, 177,902.05 and 71,556.16

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Solution

The fourth proportional to 128,917.01, 177,902.05 and 71,556.16 is: 98,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,917.01 : 177,902.05 = 71,556.16 : x
  2. Step 2: Convert to fraction form
    128,917.01/177,902.05 = 71,556.16/x
  3. Step 3: Cross multiply
    128,917.01x = 177,902.05 × 71,556.16
  4. Step 4: Simplify right side
    128,917.01x = 12,729,987,554.13
  5. Step 5: Solve for x
    x = 12,729,987,554.13/128,917.01
  6. Step 6: Final answer
    x = 98,745.60

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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.