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Finding the Fourth Proportional to 69,208.56, 103,812.87 and 19,289.95

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Solution

The fourth proportional to 69,208.56, 103,812.87 and 19,289.95 is: 28,934.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,208.56 : 103,812.87 = 19,289.95 : x
  2. Step 2: Convert to fraction form
    69,208.56/103,812.87 = 19,289.95/x
  3. Step 3: Cross multiply
    69,208.56x = 103,812.87 × 19,289.95
  4. Step 4: Simplify right side
    69,208.56x = 2,002,544,884.46
  5. Step 5: Solve for x
    x = 2,002,544,884.46/69,208.56
  6. Step 6: Final answer
    x = 28,934.93

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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.