Home / 217,648.68-300,355.18-122,155.38

Finding the Fourth Proportional to 217,648.68, 300,355.18 and 122,155.38

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Solution

The fourth proportional to 217,648.68, 300,355.18 and 122,155.38 is: 168,574.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,648.68 : 300,355.18 = 122,155.38 : x
  2. Step 2: Convert to fraction form
    217,648.68/300,355.18 = 122,155.38/x
  3. Step 3: Cross multiply
    217,648.68x = 300,355.18 × 122,155.38
  4. Step 4: Simplify right side
    217,648.68x = 36,690,001,147.87
  5. Step 5: Solve for x
    x = 36,690,001,147.87/217,648.68
  6. Step 6: Final answer
    x = 168,574.43

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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.