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Finding the Fourth Proportional to 69,318.40, 104,003.20 and 66,758.40

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Solution

The fourth proportional to 69,318.40, 104,003.20 and 66,758.40 is: 100,162.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,318.40 : 104,003.20 = 66,758.40 : x
  2. Step 2: Convert to fraction form
    69,318.40/104,003.20 = 66,758.40/x
  3. Step 3: Cross multiply
    69,318.40x = 104,003.20 × 66,758.40
  4. Step 4: Simplify right side
    69,318.40x = 6,943,087,226.88
  5. Step 5: Solve for x
    x = 6,943,087,226.88/69,318.40
  6. Step 6: Final answer
    x = 100,162.25

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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.