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Finding the Fourth Proportional to 69,405, 104,099.76 and 19,487.04

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Solution

The fourth proportional to 69,405, 104,099.76 and 19,487.04 is: 29,228.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,405 : 104,099.76 = 19,487.04 : x
  2. Step 2: Convert to fraction form
    69,405/104,099.76 = 19,487.04/x
  3. Step 3: Cross multiply
    69,405x = 104,099.76 × 19,487.04
  4. Step 4: Simplify right side
    69,405x = 2,028,596,187.11
  5. Step 5: Solve for x
    x = 2,028,596,187.11/69,405
  6. Step 6: Final answer
    x = 29,228.39

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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.