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Finding the Fourth Proportional to 211,487.99, 317,105.26 and 67,331.51

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Solution

The fourth proportional to 211,487.99, 317,105.26 and 67,331.51 is: 100,956.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,487.99 : 317,105.26 = 67,331.51 : x
  2. Step 2: Convert to fraction form
    211,487.99/317,105.26 = 67,331.51/x
  3. Step 3: Cross multiply
    211,487.99x = 317,105.26 × 67,331.51
  4. Step 4: Simplify right side
    211,487.99x = 21,351,175,984.74
  5. Step 5: Solve for x
    x = 21,351,175,984.74/211,487.99
  6. Step 6: Final answer
    x = 100,956.92

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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.