Home / 69,078.45-103,617.63-19,171.11

Finding the Fourth Proportional to 69,078.45, 103,617.63 and 19,171.11

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Solution

The fourth proportional to 69,078.45, 103,617.63 and 19,171.11 is: 28,756.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,078.45 : 103,617.63 = 19,171.11 : x
  2. Step 2: Convert to fraction form
    69,078.45/103,617.63 = 19,171.11/x
  3. Step 3: Cross multiply
    69,078.45x = 103,617.63 × 19,171.11
  4. Step 4: Simplify right side
    69,078.45x = 1,986,464,982.67
  5. Step 5: Solve for x
    x = 1,986,464,982.67/69,078.45
  6. Step 6: Final answer
    x = 28,756.65

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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.