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Finding the Fourth Proportional to 45,776.72, 68,604.60 and 20,820.08

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Solution

The fourth proportional to 45,776.72, 68,604.60 and 20,820.08 is: 31,202.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,776.72 : 68,604.60 = 20,820.08 : x
  2. Step 2: Convert to fraction form
    45,776.72/68,604.60 = 20,820.08/x
  3. Step 3: Cross multiply
    45,776.72x = 68,604.60 × 20,820.08
  4. Step 4: Simplify right side
    45,776.72x = 1,428,353,260.37
  5. Step 5: Solve for x
    x = 1,428,353,260.37/45,776.72
  6. Step 6: Final answer
    x = 31,202.61

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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.