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Finding the Fourth Proportional to 45,643.77, 68,473.73 and 20,682.81

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Solution

The fourth proportional to 45,643.77, 68,473.73 and 20,682.81 is: 31,027.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,643.77 : 68,473.73 = 20,682.81 : x
  2. Step 2: Convert to fraction form
    45,643.77/68,473.73 = 20,682.81/x
  3. Step 3: Cross multiply
    45,643.77x = 68,473.73 × 20,682.81
  4. Step 4: Simplify right side
    45,643.77x = 1,416,229,199.29
  5. Step 5: Solve for x
    x = 1,416,229,199.29/45,643.77
  6. Step 6: Final answer
    x = 31,027.88

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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.