Home / 100,109.39-138,144.96-54,778.34

Finding the Fourth Proportional to 100,109.39, 138,144.96 and 54,778.34

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Solution

The fourth proportional to 100,109.39, 138,144.96 and 54,778.34 is: 75,590.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,109.39 : 138,144.96 = 54,778.34 : x
  2. Step 2: Convert to fraction form
    100,109.39/138,144.96 = 54,778.34/x
  3. Step 3: Cross multiply
    100,109.39x = 138,144.96 × 54,778.34
  4. Step 4: Simplify right side
    100,109.39x = 7,567,351,933.53
  5. Step 5: Solve for x
    x = 7,567,351,933.53/100,109.39
  6. Step 6: Final answer
    x = 75,590.83

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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.