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Finding the Fourth Proportional to 165,939.60, 248,763.60 and 99,406.20

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Solution

The fourth proportional to 165,939.60, 248,763.60 and 99,406.20 is: 149,021.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,939.60 : 248,763.60 = 99,406.20 : x
  2. Step 2: Convert to fraction form
    165,939.60/248,763.60 = 99,406.20/x
  3. Step 3: Cross multiply
    165,939.60x = 248,763.60 × 99,406.20
  4. Step 4: Simplify right side
    165,939.60x = 24,728,644,174.32
  5. Step 5: Solve for x
    x = 24,728,644,174.32/165,939.60
  6. Step 6: Final answer
    x = 149,021.96

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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.