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Finding the Fourth Proportional to 45,986.75, 68,917.75 and 20,995.82

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Solution

The fourth proportional to 45,986.75, 68,917.75 and 20,995.82 is: 31,465.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,986.75 : 68,917.75 = 20,995.82 : x
  2. Step 2: Convert to fraction form
    45,986.75/68,917.75 = 20,995.82/x
  3. Step 3: Cross multiply
    45,986.75x = 68,917.75 × 20,995.82
  4. Step 4: Simplify right side
    45,986.75x = 1,446,984,673.81
  5. Step 5: Solve for x
    x = 1,446,984,673.81/45,986.75
  6. Step 6: Final answer
    x = 31,465.25

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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.