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Finding the Fourth Proportional to 93,786, 140,679 and 28,122

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Solution

The fourth proportional to 93,786, 140,679 and 28,122 is: 42,183

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,786 : 140,679 = 28,122 : x
  2. Step 2: Convert to fraction form
    93,786/140,679 = 28,122/x
  3. Step 3: Cross multiply
    93,786x = 140,679 × 28,122
  4. Step 4: Simplify right side
    93,786x = 3,956,174,838
  5. Step 5: Solve for x
    x = 3,956,174,838/93,786
  6. Step 6: Final answer
    x = 42,183

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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.