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Finding the Fourth Proportional to 211,891.08, 317,758.72 and 85,497.56

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Solution

The fourth proportional to 211,891.08, 317,758.72 and 85,497.56 is: 128,214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,891.08 : 317,758.72 = 85,497.56 : x
  2. Step 2: Convert to fraction form
    211,891.08/317,758.72 = 85,497.56/x
  3. Step 3: Cross multiply
    211,891.08x = 317,758.72 × 85,497.56
  4. Step 4: Simplify right side
    211,891.08x = 27,167,595,228.72
  5. Step 5: Solve for x
    x = 27,167,595,228.72/211,891.08
  6. Step 6: Final answer
    x = 128,214.91

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1.5x scale

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.