Home / 100,068.28-138,093.18-54,745.80

Finding the Fourth Proportional to 100,068.28, 138,093.18 and 54,745.80

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Solution

The fourth proportional to 100,068.28, 138,093.18 and 54,745.80 is: 75,548.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,068.28 : 138,093.18 = 54,745.80 : x
  2. Step 2: Convert to fraction form
    100,068.28/138,093.18 = 54,745.80/x
  3. Step 3: Cross multiply
    100,068.28x = 138,093.18 × 54,745.80
  4. Step 4: Simplify right side
    100,068.28x = 7,560,021,613.64
  5. Step 5: Solve for x
    x = 7,560,021,613.64/100,068.28
  6. Step 6: Final answer
    x = 75,548.63

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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.