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Finding the Fourth Proportional to 211,940.55, 317,910.01 and 54,168.75

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Solution

The fourth proportional to 211,940.55, 317,910.01 and 54,168.75 is: 81,252.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,940.55 : 317,910.01 = 54,168.75 : x
  2. Step 2: Convert to fraction form
    211,940.55/317,910.01 = 54,168.75/x
  3. Step 3: Cross multiply
    211,940.55x = 317,910.01 × 54,168.75
  4. Step 4: Simplify right side
    211,940.55x = 17,220,787,854.19
  5. Step 5: Solve for x
    x = 17,220,787,854.19/211,940.55
  6. Step 6: Final answer
    x = 81,252.92

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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.