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Finding the Fourth Proportional to 45,911.60, 68,770.20 and 40,986.80

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Solution

The fourth proportional to 45,911.60, 68,770.20 and 40,986.80 is: 61,393.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,911.60 : 68,770.20 = 40,986.80 : x
  2. Step 2: Convert to fraction form
    45,911.60/68,770.20 = 40,986.80/x
  3. Step 3: Cross multiply
    45,911.60x = 68,770.20 × 40,986.80
  4. Step 4: Simplify right side
    45,911.60x = 2,818,670,433.36
  5. Step 5: Solve for x
    x = 2,818,670,433.36/45,911.60
  6. Step 6: Final answer
    x = 61,393.43

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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.