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Finding the Fourth Proportional to 69,089.64, 103,622.87 and 19,174.81

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Solution

The fourth proportional to 69,089.64, 103,622.87 and 19,174.81 is: 28,759.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,089.64 : 103,622.87 = 19,174.81 : x
  2. Step 2: Convert to fraction form
    69,089.64/103,622.87 = 19,174.81/x
  3. Step 3: Cross multiply
    69,089.64x = 103,622.87 × 19,174.81
  4. Step 4: Simplify right side
    69,089.64x = 1,986,949,021.37
  5. Step 5: Solve for x
    x = 1,986,949,021.37/69,089.64
  6. Step 6: Final answer
    x = 28,759.00

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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.