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Finding the Fourth Proportional to 68,485.20, 102,900.60 and 43,537.20

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Solution

The fourth proportional to 68,485.20, 102,900.60 and 43,537.20 is: 65,415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,485.20 : 102,900.60 = 43,537.20 : x
  2. Step 2: Convert to fraction form
    68,485.20/102,900.60 = 43,537.20/x
  3. Step 3: Cross multiply
    68,485.20x = 102,900.60 × 43,537.20
  4. Step 4: Simplify right side
    68,485.20x = 4,480,004,002.32
  5. Step 5: Solve for x
    x = 4,480,004,002.32/68,485.20
  6. Step 6: Final answer
    x = 65,415.65

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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.