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Finding the Fourth Proportional to 165,728.70, 248,679.45 and 72,243.90

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Solution

The fourth proportional to 165,728.70, 248,679.45 and 72,243.90 is: 108,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,728.70 : 248,679.45 = 72,243.90 : x
  2. Step 2: Convert to fraction form
    165,728.70/248,679.45 = 72,243.90/x
  3. Step 3: Cross multiply
    165,728.70x = 248,679.45 × 72,243.90
  4. Step 4: Simplify right side
    165,728.70x = 17,965,573,317.86
  5. Step 5: Solve for x
    x = 17,965,573,317.86/165,728.70
  6. Step 6: Final answer
    x = 108,403.51

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.