Home / 100,268.20-138,372.90-55,556.20

Finding the Fourth Proportional to 100,268.20, 138,372.90 and 55,556.20

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Solution

The fourth proportional to 100,268.20, 138,372.90 and 55,556.20 is: 76,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,268.20 : 138,372.90 = 55,556.20 : x
  2. Step 2: Convert to fraction form
    100,268.20/138,372.90 = 55,556.20/x
  3. Step 3: Cross multiply
    100,268.20x = 138,372.90 × 55,556.20
  4. Step 4: Simplify right side
    100,268.20x = 7,687,472,506.98
  5. Step 5: Solve for x
    x = 7,687,472,506.98/100,268.20
  6. Step 6: Final answer
    x = 76,669.10

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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.