Home / 217,890.68-300,719.40-122,404.64

Finding the Fourth Proportional to 217,890.68, 300,719.40 and 122,404.64

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Solution

The fourth proportional to 217,890.68, 300,719.40 and 122,404.64 is: 168,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,890.68 : 300,719.40 = 122,404.64 : x
  2. Step 2: Convert to fraction form
    217,890.68/300,719.40 = 122,404.64/x
  3. Step 3: Cross multiply
    217,890.68x = 300,719.40 × 122,404.64
  4. Step 4: Simplify right side
    217,890.68x = 36,809,449,898.02
  5. Step 5: Solve for x
    x = 36,809,449,898.02/217,890.68
  6. Step 6: Final answer
    x = 168,935.40

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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.