Home / 211,379.63-291,668.04-139,721.36

Finding the Fourth Proportional to 211,379.63, 291,668.04 and 139,721.36

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Solution

The fourth proportional to 211,379.63, 291,668.04 and 139,721.36 is: 192,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,379.63 : 291,668.04 = 139,721.36 : x
  2. Step 2: Convert to fraction form
    211,379.63/291,668.04 = 139,721.36/x
  3. Step 3: Cross multiply
    211,379.63x = 291,668.04 × 139,721.36
  4. Step 4: Simplify right side
    211,379.63x = 40,752,253,758.99
  5. Step 5: Solve for x
    x = 40,752,253,758.99/211,379.63
  6. Step 6: Final answer
    x = 192,791.78

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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.