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Finding the Fourth Proportional to 215,389, 323,135.82 and 67,645

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Solution

The fourth proportional to 215,389, 323,135.82 and 67,645 is: 101,483.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,389 : 323,135.82 = 67,645 : x
  2. Step 2: Convert to fraction form
    215,389/323,135.82 = 67,645/x
  3. Step 3: Cross multiply
    215,389x = 323,135.82 × 67,645
  4. Step 4: Simplify right side
    215,389x = 21,858,522,543.90
  5. Step 5: Solve for x
    x = 21,858,522,543.90/215,389
  6. Step 6: Final answer
    x = 101,483.93

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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.