Home / 427,639.76-641,410.32-112,121.72

Finding the Fourth Proportional to 427,639.76, 641,410.32 and 112,121.72

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Solution

The fourth proportional to 427,639.76, 641,410.32 and 112,121.72 is: 168,169.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,639.76 : 641,410.32 = 112,121.72 : x
  2. Step 2: Convert to fraction form
    427,639.76/641,410.32 = 112,121.72/x
  3. Step 3: Cross multiply
    427,639.76x = 641,410.32 × 112,121.72
  4. Step 4: Simplify right side
    427,639.76x = 71,916,028,304.15
  5. Step 5: Solve for x
    x = 71,916,028,304.15/427,639.76
  6. Step 6: Final answer
    x = 168,169.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.