Home / 128,411.25-177,208.22-71,822.61

Finding the Fourth Proportional to 128,411.25, 177,208.22 and 71,822.61

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Solution

The fourth proportional to 128,411.25, 177,208.22 and 71,822.61 is: 99,115.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,411.25 : 177,208.22 = 71,822.61 : x
  2. Step 2: Convert to fraction form
    128,411.25/177,208.22 = 71,822.61/x
  3. Step 3: Cross multiply
    128,411.25x = 177,208.22 × 71,822.61
  4. Step 4: Simplify right side
    128,411.25x = 12,727,556,514.74
  5. Step 5: Solve for x
    x = 12,727,556,514.74/128,411.25
  6. Step 6: Final answer
    x = 99,115.59

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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.