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Finding the Fourth Proportional to 81,069.60, 121,604.81 and 36,644.34

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Solution

The fourth proportional to 81,069.60, 121,604.81 and 36,644.34 is: 54,966.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,069.60 : 121,604.81 = 36,644.34 : x
  2. Step 2: Convert to fraction form
    81,069.60/121,604.81 = 36,644.34/x
  3. Step 3: Cross multiply
    81,069.60x = 121,604.81 × 36,644.34
  4. Step 4: Simplify right side
    81,069.60x = 4,456,127,820.05
  5. Step 5: Solve for x
    x = 4,456,127,820.05/81,069.60
  6. Step 6: Final answer
    x = 54,966.69

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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.