Home / 81,725.03-122,578.43-28,407.79

Finding the Fourth Proportional to 81,725.03, 122,578.43 and 28,407.79

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Solution

The fourth proportional to 81,725.03, 122,578.43 and 28,407.79 is: 42,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,725.03 : 122,578.43 = 28,407.79 : x
  2. Step 2: Convert to fraction form
    81,725.03/122,578.43 = 28,407.79/x
  3. Step 3: Cross multiply
    81,725.03x = 122,578.43 × 28,407.79
  4. Step 4: Simplify right side
    81,725.03x = 3,482,182,297.97
  5. Step 5: Solve for x
    x = 3,482,182,297.97/81,725.03
  6. Step 6: Final answer
    x = 42,608.52

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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.