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Finding the Fourth Proportional to 149,028.96, 205,661.34 and 81,046.58

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Solution

The fourth proportional to 149,028.96, 205,661.34 and 81,046.58 is: 111,845.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,028.96 : 205,661.34 = 81,046.58 : x
  2. Step 2: Convert to fraction form
    149,028.96/205,661.34 = 81,046.58/x
  3. Step 3: Cross multiply
    149,028.96x = 205,661.34 × 81,046.58
  4. Step 4: Simplify right side
    149,028.96x = 16,668,147,216.91
  5. Step 5: Solve for x
    x = 16,668,147,216.91/149,028.96
  6. Step 6: Final answer
    x = 111,845.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.