Home / 128,902.25-177,882.43-71,538.24

Finding the Fourth Proportional to 128,902.25, 177,882.43 and 71,538.24

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Solution

The fourth proportional to 128,902.25, 177,882.43 and 71,538.24 is: 98,721.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,902.25 : 177,882.43 = 71,538.24 : x
  2. Step 2: Convert to fraction form
    128,902.25/177,882.43 = 71,538.24/x
  3. Step 3: Cross multiply
    128,902.25x = 177,882.43 × 71,538.24
  4. Step 4: Simplify right side
    128,902.25x = 12,725,396,158.24
  5. Step 5: Solve for x
    x = 12,725,396,158.24/128,902.25
  6. Step 6: Final answer
    x = 98,721.29

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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.