Home / 211,278.78-291,563.55-115,782.21

Finding the Fourth Proportional to 211,278.78, 291,563.55 and 115,782.21

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Solution

The fourth proportional to 211,278.78, 291,563.55 and 115,782.21 is: 159,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,278.78 : 291,563.55 = 115,782.21 : x
  2. Step 2: Convert to fraction form
    211,278.78/291,563.55 = 115,782.21/x
  3. Step 3: Cross multiply
    211,278.78x = 291,563.55 × 115,782.21
  4. Step 4: Simplify right side
    211,278.78x = 33,757,872,174.45
  5. Step 5: Solve for x
    x = 33,757,872,174.45/211,278.78
  6. Step 6: Final answer
    x = 159,778.81

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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.