Home / 212,251.38-317,975.71-125,438.21

Finding the Fourth Proportional to 212,251.38, 317,975.71 and 125,438.21

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Solution

The fourth proportional to 212,251.38, 317,975.71 and 125,438.21 is: 187,920.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,251.38 : 317,975.71 = 125,438.21 : x
  2. Step 2: Convert to fraction form
    212,251.38/317,975.71 = 125,438.21/x
  3. Step 3: Cross multiply
    212,251.38x = 317,975.71 × 125,438.21
  4. Step 4: Simplify right side
    212,251.38x = 39,886,303,885.88
  5. Step 5: Solve for x
    x = 39,886,303,885.88/212,251.38
  6. Step 6: Final answer
    x = 187,920.12

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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.