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Finding the Fourth Proportional to 115,989, 173,859.12 and 75,992.88

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Solution

The fourth proportional to 115,989, 173,859.12 and 75,992.88 is: 113,907.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,989 : 173,859.12 = 75,992.88 : x
  2. Step 2: Convert to fraction form
    115,989/173,859.12 = 75,992.88/x
  3. Step 3: Cross multiply
    115,989x = 173,859.12 × 75,992.88
  4. Step 4: Simplify right side
    115,989x = 13,212,055,243.07
  5. Step 5: Solve for x
    x = 13,212,055,243.07/115,989
  6. Step 6: Final answer
    x = 113,907.83

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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.