Home / 165,728.20-248,678.70-72,243.40

Finding the Fourth Proportional to 165,728.20, 248,678.70 and 72,243.40

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Solution

The fourth proportional to 165,728.20, 248,678.70 and 72,243.40 is: 108,402.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,728.20 : 248,678.70 = 72,243.40 : x
  2. Step 2: Convert to fraction form
    165,728.20/248,678.70 = 72,243.40/x
  3. Step 3: Cross multiply
    165,728.20x = 248,678.70 × 72,243.40
  4. Step 4: Simplify right side
    165,728.20x = 17,965,394,795.58
  5. Step 5: Solve for x
    x = 17,965,394,795.58/165,728.20
  6. Step 6: Final answer
    x = 108,402.76

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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.