Home / 100,112.25-138,204.88-57,662.58

Finding the Fourth Proportional to 100,112.25, 138,204.88 and 57,662.58

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Solution

The fourth proportional to 100,112.25, 138,204.88 and 57,662.58 is: 79,603.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.25 : 138,204.88 = 57,662.58 : x
  2. Step 2: Convert to fraction form
    100,112.25/138,204.88 = 57,662.58/x
  3. Step 3: Cross multiply
    100,112.25x = 138,204.88 × 57,662.58
  4. Step 4: Simplify right side
    100,112.25x = 7,969,250,647.85
  5. Step 5: Solve for x
    x = 7,969,250,647.85/100,112.25
  6. Step 6: Final answer
    x = 79,603.15

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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.