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Finding the Fourth Proportional to 45,855.81, 68,783.72 and 30,269.79

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Solution

The fourth proportional to 45,855.81, 68,783.72 and 30,269.79 is: 45,404.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,855.81 : 68,783.72 = 30,269.79 : x
  2. Step 2: Convert to fraction form
    45,855.81/68,783.72 = 30,269.79/x
  3. Step 3: Cross multiply
    45,855.81x = 68,783.72 × 30,269.79
  4. Step 4: Simplify right side
    45,855.81x = 2,082,068,608.47
  5. Step 5: Solve for x
    x = 2,082,068,608.47/45,855.81
  6. Step 6: Final answer
    x = 45,404.69

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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.