Home / 211,385.79-291,712.32-115,890.44

Finding the Fourth Proportional to 211,385.79, 291,712.32 and 115,890.44

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Solution

The fourth proportional to 211,385.79, 291,712.32 and 115,890.44 is: 159,928.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,385.79 : 291,712.32 = 115,890.44 : x
  2. Step 2: Convert to fraction form
    211,385.79/291,712.32 = 115,890.44/x
  3. Step 3: Cross multiply
    211,385.79x = 291,712.32 × 115,890.44
  4. Step 4: Simplify right side
    211,385.79x = 33,806,667,659.66
  5. Step 5: Solve for x
    x = 33,806,667,659.66/211,385.79
  6. Step 6: Final answer
    x = 159,928.76

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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.