Home / 76,986.81-115,457.13-27,057.60

Finding the Fourth Proportional to 76,986.81, 115,457.13 and 27,057.60

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Solution

The fourth proportional to 76,986.81, 115,457.13 and 27,057.60 is: 40,578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,986.81 : 115,457.13 = 27,057.60 : x
  2. Step 2: Convert to fraction form
    76,986.81/115,457.13 = 27,057.60/x
  3. Step 3: Cross multiply
    76,986.81x = 115,457.13 × 27,057.60
  4. Step 4: Simplify right side
    76,986.81x = 3,123,992,840.69
  5. Step 5: Solve for x
    x = 3,123,992,840.69/76,986.81
  6. Step 6: Final answer
    x = 40,578.29

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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.