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Finding the Fourth Proportional to 217,622.21, 300,320.41 and 122,151.43

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Solution

The fourth proportional to 217,622.21, 300,320.41 and 122,151.43 is: 168,569.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,622.21 : 300,320.41 = 122,151.43 : x
  2. Step 2: Convert to fraction form
    217,622.21/300,320.41 = 122,151.43/x
  3. Step 3: Cross multiply
    217,622.21x = 300,320.41 × 122,151.43
  4. Step 4: Simplify right side
    217,622.21x = 36,684,567,539.69
  5. Step 5: Solve for x
    x = 36,684,567,539.69/217,622.21
  6. Step 6: Final answer
    x = 168,569.96

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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.