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Finding the Fourth Proportional to 211,375.17, 291,690 and 115,879.77

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Solution

The fourth proportional to 211,375.17, 291,690 and 115,879.77 is: 159,909.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,375.17 : 291,690 = 115,879.77 : x
  2. Step 2: Convert to fraction form
    211,375.17/291,690 = 115,879.77/x
  3. Step 3: Cross multiply
    211,375.17x = 291,690 × 115,879.77
  4. Step 4: Simplify right side
    211,375.17x = 33,800,970,111.30
  5. Step 5: Solve for x
    x = 33,800,970,111.30/211,375.17
  6. Step 6: Final answer
    x = 159,909.84

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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.