Home / 217,913.14-300,718.32-122,417.78

Finding the Fourth Proportional to 217,913.14, 300,718.32 and 122,417.78

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Solution

The fourth proportional to 217,913.14, 300,718.32 and 122,417.78 is: 168,935.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,913.14 : 300,718.32 = 122,417.78 : x
  2. Step 2: Convert to fraction form
    217,913.14/300,718.32 = 122,417.78/x
  3. Step 3: Cross multiply
    217,913.14x = 300,718.32 × 122,417.78
  4. Step 4: Simplify right side
    217,913.14x = 36,813,269,139.73
  5. Step 5: Solve for x
    x = 36,813,269,139.73/217,913.14
  6. Step 6: Final answer
    x = 168,935.52

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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.