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Finding the Fourth Proportional to 103,793.70, 155,690.49 and 74,269.20

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Solution

The fourth proportional to 103,793.70, 155,690.49 and 74,269.20 is: 111,403.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,793.70 : 155,690.49 = 74,269.20 : x
  2. Step 2: Convert to fraction form
    103,793.70/155,690.49 = 74,269.20/x
  3. Step 3: Cross multiply
    103,793.70x = 155,690.49 × 74,269.20
  4. Step 4: Simplify right side
    103,793.70x = 11,563,008,139.91
  5. Step 5: Solve for x
    x = 11,563,008,139.91/103,793.70
  6. Step 6: Final answer
    x = 111,403.76

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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.