Home / 100,377.21-138,520.75-55,055.56

Finding the Fourth Proportional to 100,377.21, 138,520.75 and 55,055.56

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Solution

The fourth proportional to 100,377.21, 138,520.75 and 55,055.56 is: 75,976.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,377.21 : 138,520.75 = 55,055.56 : x
  2. Step 2: Convert to fraction form
    100,377.21/138,520.75 = 55,055.56/x
  3. Step 3: Cross multiply
    100,377.21x = 138,520.75 × 55,055.56
  4. Step 4: Simplify right side
    100,377.21x = 7,626,337,462.87
  5. Step 5: Solve for x
    x = 7,626,337,462.87/100,377.21
  6. Step 6: Final answer
    x = 75,976.78

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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.