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Finding the Fourth Proportional to 211,104.72, 316,655 and 91,246.44

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Solution

The fourth proportional to 211,104.72, 316,655 and 91,246.44 is: 136,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,104.72 : 316,655 = 91,246.44 : x
  2. Step 2: Convert to fraction form
    211,104.72/316,655 = 91,246.44/x
  3. Step 3: Cross multiply
    211,104.72x = 316,655 × 91,246.44
  4. Step 4: Simplify right side
    211,104.72x = 28,893,641,458.20
  5. Step 5: Solve for x
    x = 28,893,641,458.20/211,104.72
  6. Step 6: Final answer
    x = 136,868.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.