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Finding the Fourth Proportional to 161,940.30, 223,478 and 90,324.96

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Solution

The fourth proportional to 161,940.30, 223,478 and 90,324.96 is: 124,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,940.30 : 223,478 = 90,324.96 : x
  2. Step 2: Convert to fraction form
    161,940.30/223,478 = 90,324.96/x
  3. Step 3: Cross multiply
    161,940.30x = 223,478 × 90,324.96
  4. Step 4: Simplify right side
    161,940.30x = 20,185,641,410.88
  5. Step 5: Solve for x
    x = 20,185,641,410.88/161,940.30
  6. Step 6: Final answer
    x = 124,648.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.