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Finding the Fourth Proportional to 79,993.98, 120,008.87 and 30,074.51

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Solution

The fourth proportional to 79,993.98, 120,008.87 and 30,074.51 is: 45,118.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,993.98 : 120,008.87 = 30,074.51 : x
  2. Step 2: Convert to fraction form
    79,993.98/120,008.87 = 30,074.51/x
  3. Step 3: Cross multiply
    79,993.98x = 120,008.87 × 30,074.51
  4. Step 4: Simplify right side
    79,993.98x = 3,609,207,716.84
  5. Step 5: Solve for x
    x = 3,609,207,716.84/79,993.98
  6. Step 6: Final answer
    x = 45,118.49

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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.