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Finding the Fourth Proportional to 100,361.22, 138,504.70 and 55,649.22

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Solution

The fourth proportional to 100,361.22, 138,504.70 and 55,649.22 is: 76,799.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,361.22 : 138,504.70 = 55,649.22 : x
  2. Step 2: Convert to fraction form
    100,361.22/138,504.70 = 55,649.22/x
  3. Step 3: Cross multiply
    100,361.22x = 138,504.70 × 55,649.22
  4. Step 4: Simplify right side
    100,361.22x = 7,707,678,521.33
  5. Step 5: Solve for x
    x = 7,707,678,521.33/100,361.22
  6. Step 6: Final answer
    x = 76,799.37

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1.5x scale

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.