Home / 217,620.21-300,317.65-122,149.43

Finding the Fourth Proportional to 217,620.21, 300,317.65 and 122,149.43

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Solution

The fourth proportional to 217,620.21, 300,317.65 and 122,149.43 is: 168,567.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,620.21 : 300,317.65 = 122,149.43 : x
  2. Step 2: Convert to fraction form
    217,620.21/300,317.65 = 122,149.43/x
  3. Step 3: Cross multiply
    217,620.21x = 300,317.65 × 122,149.43
  4. Step 4: Simplify right side
    217,620.21x = 36,683,627,959.48
  5. Step 5: Solve for x
    x = 36,683,627,959.48/217,620.21
  6. Step 6: Final answer
    x = 168,567.19

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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.