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Finding the Fourth Proportional to 81,809.88, 122,554.44 and 42,392.85

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Solution

The fourth proportional to 81,809.88, 122,554.44 and 42,392.85 is: 63,506.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,809.88 : 122,554.44 = 42,392.85 : x
  2. Step 2: Convert to fraction form
    81,809.88/122,554.44 = 42,392.85/x
  3. Step 3: Cross multiply
    81,809.88x = 122,554.44 × 42,392.85
  4. Step 4: Simplify right side
    81,809.88x = 5,195,431,991.75
  5. Step 5: Solve for x
    x = 5,195,431,991.75/81,809.88
  6. Step 6: Final answer
    x = 63,506.17

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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.