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Finding the Fourth Proportional to 67,231.40, 100,868.70 and 45,069.80

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Solution

The fourth proportional to 67,231.40, 100,868.70 and 45,069.80 is: 67,619.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,231.40 : 100,868.70 = 45,069.80 : x
  2. Step 2: Convert to fraction form
    67,231.40/100,868.70 = 45,069.80/x
  3. Step 3: Cross multiply
    67,231.40x = 100,868.70 × 45,069.80
  4. Step 4: Simplify right side
    67,231.40x = 4,546,132,135.26
  5. Step 5: Solve for x
    x = 4,546,132,135.26/67,231.40
  6. Step 6: Final answer
    x = 67,619.18

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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.