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Finding the Fourth Proportional to 217,065.69, 325,630.04 and 67,318.05

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Solution

The fourth proportional to 217,065.69, 325,630.04 and 67,318.05 is: 100,986.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,065.69 : 325,630.04 = 67,318.05 : x
  2. Step 2: Convert to fraction form
    217,065.69/325,630.04 = 67,318.05/x
  3. Step 3: Cross multiply
    217,065.69x = 325,630.04 × 67,318.05
  4. Step 4: Simplify right side
    217,065.69x = 21,920,778,977.63
  5. Step 5: Solve for x
    x = 21,920,778,977.63/217,065.69
  6. Step 6: Final answer
    x = 100,986.84

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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.