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Finding the Fourth Proportional to 115,990, 173,860.62 and 75,993.88

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Solution

The fourth proportional to 115,990, 173,860.62 and 75,993.88 is: 113,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,990 : 173,860.62 = 75,993.88 : x
  2. Step 2: Convert to fraction form
    115,990/173,860.62 = 75,993.88/x
  3. Step 3: Cross multiply
    115,990x = 173,860.62 × 75,993.88
  4. Step 4: Simplify right side
    115,990x = 13,212,343,093.01
  5. Step 5: Solve for x
    x = 13,212,343,093.01/115,990
  6. Step 6: Final answer
    x = 113,909.33

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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.