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Finding the Fourth Proportional to 209,220.48, 288,724.92 and 113,727.48

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Solution

The fourth proportional to 209,220.48, 288,724.92 and 113,727.48 is: 156,944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,220.48 : 288,724.92 = 113,727.48 : x
  2. Step 2: Convert to fraction form
    209,220.48/288,724.92 = 113,727.48/x
  3. Step 3: Cross multiply
    209,220.48x = 288,724.92 × 113,727.48
  4. Step 4: Simplify right side
    209,220.48x = 32,835,957,564.80
  5. Step 5: Solve for x
    x = 32,835,957,564.80/209,220.48
  6. Step 6: Final answer
    x = 156,944.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.