Home / 69,120.41-103,668.06-19,187.96

Finding the Fourth Proportional to 69,120.41, 103,668.06 and 19,187.96

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Solution

The fourth proportional to 69,120.41, 103,668.06 and 19,187.96 is: 28,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,120.41 : 103,668.06 = 19,187.96 : x
  2. Step 2: Convert to fraction form
    69,120.41/103,668.06 = 19,187.96/x
  3. Step 3: Cross multiply
    69,120.41x = 103,668.06 × 19,187.96
  4. Step 4: Simplify right side
    69,120.41x = 1,989,178,588.56
  5. Step 5: Solve for x
    x = 1,989,178,588.56/69,120.41
  6. Step 6: Final answer
    x = 28,778.45

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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.