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Finding the Fourth Proportional to 73,290, 101,140.74 and 39,756

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Solution

The fourth proportional to 73,290, 101,140.74 and 39,756 is: 54,863.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,290 : 101,140.74 = 39,756 : x
  2. Step 2: Convert to fraction form
    73,290/101,140.74 = 39,756/x
  3. Step 3: Cross multiply
    73,290x = 101,140.74 × 39,756
  4. Step 4: Simplify right side
    73,290x = 4,020,951,259.44
  5. Step 5: Solve for x
    x = 4,020,951,259.44/73,290
  6. Step 6: Final answer
    x = 54,863.57

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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.