Home / 76,540.41-114,812.78-21,136.41

Finding the Fourth Proportional to 76,540.41, 114,812.78 and 21,136.41

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Solution

The fourth proportional to 76,540.41, 114,812.78 and 21,136.41 is: 31,705.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,540.41 : 114,812.78 = 21,136.41 : x
  2. Step 2: Convert to fraction form
    76,540.41/114,812.78 = 21,136.41/x
  3. Step 3: Cross multiply
    76,540.41x = 114,812.78 × 21,136.41
  4. Step 4: Simplify right side
    76,540.41x = 2,426,729,885.64
  5. Step 5: Solve for x
    x = 2,426,729,885.64/76,540.41
  6. Step 6: Final answer
    x = 31,705.21

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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.