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Finding the Fourth Proportional to 69,310.22, 103,971.87 and 19,390.32

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Solution

The fourth proportional to 69,310.22, 103,971.87 and 19,390.32 is: 29,087.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,310.22 : 103,971.87 = 19,390.32 : x
  2. Step 2: Convert to fraction form
    69,310.22/103,971.87 = 19,390.32/x
  3. Step 3: Cross multiply
    69,310.22x = 103,971.87 × 19,390.32
  4. Step 4: Simplify right side
    69,310.22x = 2,016,047,830.30
  5. Step 5: Solve for x
    x = 2,016,047,830.30/69,310.22
  6. Step 6: Final answer
    x = 29,087.31

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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.