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Finding the Fourth Proportional to 165,734.70, 248,688.45 and 72,249.90

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Solution

The fourth proportional to 165,734.70, 248,688.45 and 72,249.90 is: 108,412.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,734.70 : 248,688.45 = 72,249.90 : x
  2. Step 2: Convert to fraction form
    165,734.70/248,688.45 = 72,249.90/x
  3. Step 3: Cross multiply
    165,734.70x = 248,688.45 × 72,249.90
  4. Step 4: Simplify right side
    165,734.70x = 17,967,715,643.66
  5. Step 5: Solve for x
    x = 17,967,715,643.66/165,734.70
  6. Step 6: Final answer
    x = 108,412.51

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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.