Home / 211,921.44-317,759-85,458.14

Finding the Fourth Proportional to 211,921.44, 317,759 and 85,458.14

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Solution

The fourth proportional to 211,921.44, 317,759 and 85,458.14 is: 128,137.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,921.44 : 317,759 = 85,458.14 : x
  2. Step 2: Convert to fraction form
    211,921.44/317,759 = 85,458.14/x
  3. Step 3: Cross multiply
    211,921.44x = 317,759 × 85,458.14
  4. Step 4: Simplify right side
    211,921.44x = 27,155,093,108.26
  5. Step 5: Solve for x
    x = 27,155,093,108.26/211,921.44
  6. Step 6: Final answer
    x = 128,137.55

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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.