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Finding the Fourth Proportional to 68,497.20, 102,918.60 and 43,549.20

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Solution

The fourth proportional to 68,497.20, 102,918.60 and 43,549.20 is: 65,433.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,497.20 : 102,918.60 = 43,549.20 : x
  2. Step 2: Convert to fraction form
    68,497.20/102,918.60 = 43,549.20/x
  3. Step 3: Cross multiply
    68,497.20x = 102,918.60 × 43,549.20
  4. Step 4: Simplify right side
    68,497.20x = 4,482,022,695.12
  5. Step 5: Solve for x
    x = 4,482,022,695.12/68,497.20
  6. Step 6: Final answer
    x = 65,433.66

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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.