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Finding the Fourth Proportional to 69,285.40, 103,928.34 and 19,365.18

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Solution

The fourth proportional to 69,285.40, 103,928.34 and 19,365.18 is: 29,047.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,285.40 : 103,928.34 = 19,365.18 : x
  2. Step 2: Convert to fraction form
    69,285.40/103,928.34 = 19,365.18/x
  3. Step 3: Cross multiply
    69,285.40x = 103,928.34 × 19,365.18
  4. Step 4: Simplify right side
    69,285.40x = 2,012,591,011.20
  5. Step 5: Solve for x
    x = 2,012,591,011.20/69,285.40
  6. Step 6: Final answer
    x = 29,047.84

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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.