Home / 100,442.82-138,615.07-55,122.43

Finding the Fourth Proportional to 100,442.82, 138,615.07 and 55,122.43

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Solution

The fourth proportional to 100,442.82, 138,615.07 and 55,122.43 is: 76,071.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,442.82 : 138,615.07 = 55,122.43 : x
  2. Step 2: Convert to fraction form
    100,442.82/138,615.07 = 55,122.43/x
  3. Step 3: Cross multiply
    100,442.82x = 138,615.07 × 55,122.43
  4. Step 4: Simplify right side
    100,442.82x = 7,640,798,799.94
  5. Step 5: Solve for x
    x = 7,640,798,799.94/100,442.82
  6. Step 6: Final answer
    x = 76,071.13

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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.