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Finding the Fourth Proportional to 217,821.54, 300,609.72 and 122,333.88

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Solution

The fourth proportional to 217,821.54, 300,609.72 and 122,333.88 is: 168,829.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,821.54 : 300,609.72 = 122,333.88 : x
  2. Step 2: Convert to fraction form
    217,821.54/300,609.72 = 122,333.88/x
  3. Step 3: Cross multiply
    217,821.54x = 300,609.72 × 122,333.88
  4. Step 4: Simplify right side
    217,821.54x = 36,774,753,413.31
  5. Step 5: Solve for x
    x = 36,774,753,413.31/217,821.54
  6. Step 6: Final answer
    x = 168,829.74

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1.5x scale

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.