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Finding the Fourth Proportional to 165,805.20, 248,794.20 and 72,320.40

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Solution

The fourth proportional to 165,805.20, 248,794.20 and 72,320.40 is: 108,518.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,805.20 : 248,794.20 = 72,320.40 : x
  2. Step 2: Convert to fraction form
    165,805.20/248,794.20 = 72,320.40/x
  3. Step 3: Cross multiply
    165,805.20x = 248,794.20 × 72,320.40
  4. Step 4: Simplify right side
    165,805.20x = 17,992,896,061.68
  5. Step 5: Solve for x
    x = 17,992,896,061.68/165,805.20
  6. Step 6: Final answer
    x = 108,518.29

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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.