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Finding the Fourth Proportional to 81,093.51, 121,675.32 and 43,609.77

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Solution

The fourth proportional to 81,093.51, 121,675.32 and 43,609.77 is: 65,433.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,093.51 : 121,675.32 = 43,609.77 : x
  2. Step 2: Convert to fraction form
    81,093.51/121,675.32 = 43,609.77/x
  3. Step 3: Cross multiply
    81,093.51x = 121,675.32 × 43,609.77
  4. Step 4: Simplify right side
    81,093.51x = 5,306,232,719.88
  5. Step 5: Solve for x
    x = 5,306,232,719.88/81,093.51
  6. Step 6: Final answer
    x = 65,433.51

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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.