Home / 128,514.48-192,757.07-81,275.28

Finding the Fourth Proportional to 128,514.48, 192,757.07 and 81,275.28

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Solution

The fourth proportional to 128,514.48, 192,757.07 and 81,275.28 is: 121,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.48 : 192,757.07 = 81,275.28 : x
  2. Step 2: Convert to fraction form
    128,514.48/192,757.07 = 81,275.28/x
  3. Step 3: Cross multiply
    128,514.48x = 192,757.07 × 81,275.28
  4. Step 4: Simplify right side
    128,514.48x = 15,666,384,429.85
  5. Step 5: Solve for x
    x = 15,666,384,429.85/128,514.48
  6. Step 6: Final answer
    x = 121,903.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.