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Finding the Fourth Proportional to 81,101.45, 121,652.17 and 41,636.63

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Solution

The fourth proportional to 81,101.45, 121,652.17 and 41,636.63 is: 62,454.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,101.45 : 121,652.17 = 41,636.63 : x
  2. Step 2: Convert to fraction form
    81,101.45/121,652.17 = 41,636.63/x
  3. Step 3: Cross multiply
    81,101.45x = 121,652.17 × 41,636.63
  4. Step 4: Simplify right side
    81,101.45x = 5,065,185,574.54
  5. Step 5: Solve for x
    x = 5,065,185,574.54/81,101.45
  6. Step 6: Final answer
    x = 62,454.94

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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.