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Finding the Fourth Proportional to 69,079.46, 103,619.12 and 19,172.12

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Solution

The fourth proportional to 69,079.46, 103,619.12 and 19,172.12 is: 28,758.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,079.46 : 103,619.12 = 19,172.12 : x
  2. Step 2: Convert to fraction form
    69,079.46/103,619.12 = 19,172.12/x
  3. Step 3: Cross multiply
    69,079.46x = 103,619.12 × 19,172.12
  4. Step 4: Simplify right side
    69,079.46x = 1,986,598,202.93
  5. Step 5: Solve for x
    x = 1,986,598,202.93/69,079.46
  6. Step 6: Final answer
    x = 28,758.16

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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.