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Finding the Fourth Proportional to 148,998.38, 205,617.76 and 81,930.38

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Solution

The fourth proportional to 148,998.38, 205,617.76 and 81,930.38 is: 113,063.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,998.38 : 205,617.76 = 81,930.38 : x
  2. Step 2: Convert to fraction form
    148,998.38/205,617.76 = 81,930.38/x
  3. Step 3: Cross multiply
    148,998.38x = 205,617.76 × 81,930.38
  4. Step 4: Simplify right side
    148,998.38x = 16,846,339,978.63
  5. Step 5: Solve for x
    x = 16,846,339,978.63/148,998.38
  6. Step 6: Final answer
    x = 113,063.92

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1.5x scale

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.