Home / 128,619.20-193,058.40-62,112.80

Finding the Fourth Proportional to 128,619.20, 193,058.40 and 62,112.80

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Solution

The fourth proportional to 128,619.20, 193,058.40 and 62,112.80 is: 93,231.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,619.20 : 193,058.40 = 62,112.80 : x
  2. Step 2: Convert to fraction form
    128,619.20/193,058.40 = 62,112.80/x
  3. Step 3: Cross multiply
    128,619.20x = 193,058.40 × 62,112.80
  4. Step 4: Simplify right side
    128,619.20x = 11,991,397,787.52
  5. Step 5: Solve for x
    x = 11,991,397,787.52/128,619.20
  6. Step 6: Final answer
    x = 93,231.79

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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.