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Finding the Fourth Proportional to 86,398.67, 119,245.43 and 68,629.30

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Solution

The fourth proportional to 86,398.67, 119,245.43 and 68,629.30 is: 94,720.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,398.67 : 119,245.43 = 68,629.30 : x
  2. Step 2: Convert to fraction form
    86,398.67/119,245.43 = 68,629.30/x
  3. Step 3: Cross multiply
    86,398.67x = 119,245.43 × 68,629.30
  4. Step 4: Simplify right side
    86,398.67x = 8,183,730,389.10
  5. Step 5: Solve for x
    x = 8,183,730,389.10/86,398.67
  6. Step 6: Final answer
    x = 94,720.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.