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Finding the Fourth Proportional to 69,072, 103,610.24 and 19,152.64

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Solution

The fourth proportional to 69,072, 103,610.24 and 19,152.64 is: 28,729.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,072 : 103,610.24 = 19,152.64 : x
  2. Step 2: Convert to fraction form
    69,072/103,610.24 = 19,152.64/x
  3. Step 3: Cross multiply
    69,072x = 103,610.24 × 19,152.64
  4. Step 4: Simplify right side
    69,072x = 1,984,409,627.03
  5. Step 5: Solve for x
    x = 1,984,409,627.03/69,072
  6. Step 6: Final answer
    x = 28,729.58

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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.