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Finding the Fourth Proportional to 69,322.40, 103,983.60 and 68,739.20

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Solution

The fourth proportional to 69,322.40, 103,983.60 and 68,739.20 is: 103,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,322.40 : 103,983.60 = 68,739.20 : x
  2. Step 2: Convert to fraction form
    69,322.40/103,983.60 = 68,739.20/x
  3. Step 3: Cross multiply
    69,322.40x = 103,983.60 × 68,739.20
  4. Step 4: Simplify right side
    69,322.40x = 7,147,749,477.12
  5. Step 5: Solve for x
    x = 7,147,749,477.12/69,322.40
  6. Step 6: Final answer
    x = 103,108.80

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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.