Home / 128,501.20-177,207.24-100,196.56

Finding the Fourth Proportional to 128,501.20, 177,207.24 and 100,196.56

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Solution

The fourth proportional to 128,501.20, 177,207.24 and 100,196.56 is: 138,174.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,501.20 : 177,207.24 = 100,196.56 : x
  2. Step 2: Convert to fraction form
    128,501.20/177,207.24 = 100,196.56/x
  3. Step 3: Cross multiply
    128,501.20x = 177,207.24 × 100,196.56
  4. Step 4: Simplify right side
    128,501.20x = 17,755,555,855.09
  5. Step 5: Solve for x
    x = 17,755,555,855.09/128,501.20
  6. Step 6: Final answer
    x = 138,174.24

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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.