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Finding the Fourth Proportional to 218,756.75, 328,136.49 and 60,986.57

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Solution

The fourth proportional to 218,756.75, 328,136.49 and 60,986.57 is: 91,480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,756.75 : 328,136.49 = 60,986.57 : x
  2. Step 2: Convert to fraction form
    218,756.75/328,136.49 = 60,986.57/x
  3. Step 3: Cross multiply
    218,756.75x = 328,136.49 × 60,986.57
  4. Step 4: Simplify right side
    218,756.75x = 20,011,919,016.94
  5. Step 5: Solve for x
    x = 20,011,919,016.94/218,756.75
  6. Step 6: Final answer
    x = 91,480.24

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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.