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Finding the Fourth Proportional to 69,278.79, 103,945.64 and 36,019.83

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Solution

The fourth proportional to 69,278.79, 103,945.64 and 36,019.83 is: 54,044.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,278.79 : 103,945.64 = 36,019.83 : x
  2. Step 2: Convert to fraction form
    69,278.79/103,945.64 = 36,019.83/x
  3. Step 3: Cross multiply
    69,278.79x = 103,945.64 × 36,019.83
  4. Step 4: Simplify right side
    69,278.79x = 3,744,104,101.94
  5. Step 5: Solve for x
    x = 3,744,104,101.94/69,278.79
  6. Step 6: Final answer
    x = 54,044.02

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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.