Home / 211,131.82-291,351-115,620.09

Finding the Fourth Proportional to 211,131.82, 291,351 and 115,620.09

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Solution

The fourth proportional to 211,131.82, 291,351 and 115,620.09 is: 159,549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,131.82 : 291,351 = 115,620.09 : x
  2. Step 2: Convert to fraction form
    211,131.82/291,351 = 115,620.09/x
  3. Step 3: Cross multiply
    211,131.82x = 291,351 × 115,620.09
  4. Step 4: Simplify right side
    211,131.82x = 33,686,028,841.59
  5. Step 5: Solve for x
    x = 33,686,028,841.59/211,131.82
  6. Step 6: Final answer
    x = 159,549.75

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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.