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Finding the Fourth Proportional to 217,713.57, 300,424.19 and 122,201.61

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Solution

The fourth proportional to 217,713.57, 300,424.19 and 122,201.61 is: 168,626.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,713.57 : 300,424.19 = 122,201.61 : x
  2. Step 2: Convert to fraction form
    217,713.57/300,424.19 = 122,201.61/x
  3. Step 3: Cross multiply
    217,713.57x = 300,424.19 × 122,201.61
  4. Step 4: Simplify right side
    217,713.57x = 36,712,319,089.94
  5. Step 5: Solve for x
    x = 36,712,319,089.94/217,713.57
  6. Step 6: Final answer
    x = 168,626.69

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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.