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Finding the Fourth Proportional to 70,180.82, 105,239.96 and 20,249.05

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Solution

The fourth proportional to 70,180.82, 105,239.96 and 20,249.05 is: 30,364.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,180.82 : 105,239.96 = 20,249.05 : x
  2. Step 2: Convert to fraction form
    70,180.82/105,239.96 = 20,249.05/x
  3. Step 3: Cross multiply
    70,180.82x = 105,239.96 × 20,249.05
  4. Step 4: Simplify right side
    70,180.82x = 2,131,008,999.56
  5. Step 5: Solve for x
    x = 2,131,008,999.56/70,180.82
  6. Step 6: Final answer
    x = 30,364.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.