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Finding the Fourth Proportional to 81,104.45, 121,656.66 and 41,639.63

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Solution

The fourth proportional to 81,104.45, 121,656.66 and 41,639.63 is: 62,459.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,104.45 : 121,656.66 = 41,639.63 : x
  2. Step 2: Convert to fraction form
    81,104.45/121,656.66 = 41,639.63/x
  3. Step 3: Cross multiply
    81,104.45x = 121,656.66 × 41,639.63
  4. Step 4: Simplify right side
    81,104.45x = 5,065,738,309.44
  5. Step 5: Solve for x
    x = 5,065,738,309.44/81,104.45
  6. Step 6: Final answer
    x = 62,459.44

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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.