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Finding the Fourth Proportional to 93,990, 140,985 and 28,326

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Solution

The fourth proportional to 93,990, 140,985 and 28,326 is: 42,489

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,990 : 140,985 = 28,326 : x
  2. Step 2: Convert to fraction form
    93,990/140,985 = 28,326/x
  3. Step 3: Cross multiply
    93,990x = 140,985 × 28,326
  4. Step 4: Simplify right side
    93,990x = 3,993,541,110
  5. Step 5: Solve for x
    x = 3,993,541,110/93,990
  6. Step 6: Final answer
    x = 42,489

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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.