Home / 211,786.38-292,291.53-121,129.77

Finding the Fourth Proportional to 211,786.38, 292,291.53 and 121,129.77

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Solution

The fourth proportional to 211,786.38, 292,291.53 and 121,129.77 is: 167,174.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,786.38 : 292,291.53 = 121,129.77 : x
  2. Step 2: Convert to fraction form
    211,786.38/292,291.53 = 121,129.77/x
  3. Step 3: Cross multiply
    211,786.38x = 292,291.53 × 121,129.77
  4. Step 4: Simplify right side
    211,786.38x = 35,405,205,801.85
  5. Step 5: Solve for x
    x = 35,405,205,801.85/211,786.38
  6. Step 6: Final answer
    x = 167,174.14

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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.