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Finding the Fourth Proportional to 81,699.66, 122,654.44 and 62,991.58

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Solution

The fourth proportional to 81,699.66, 122,654.44 and 62,991.58 is: 94,568.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,699.66 : 122,654.44 = 62,991.58 : x
  2. Step 2: Convert to fraction form
    81,699.66/122,654.44 = 62,991.58/x
  3. Step 3: Cross multiply
    81,699.66x = 122,654.44 × 62,991.58
  4. Step 4: Simplify right side
    81,699.66x = 7,726,196,969.62
  5. Step 5: Solve for x
    x = 7,726,196,969.62/81,699.66
  6. Step 6: Final answer
    x = 94,568.29

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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.