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Finding the Fourth Proportional to 68,318.78, 102,466.53 and 18,387.74

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Solution

The fourth proportional to 68,318.78, 102,466.53 and 18,387.74 is: 27,578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,318.78 : 102,466.53 = 18,387.74 : x
  2. Step 2: Convert to fraction form
    68,318.78/102,466.53 = 18,387.74/x
  3. Step 3: Cross multiply
    68,318.78x = 102,466.53 × 18,387.74
  4. Step 4: Simplify right side
    68,318.78x = 1,884,128,168.51
  5. Step 5: Solve for x
    x = 1,884,128,168.51/68,318.78
  6. Step 6: Final answer
    x = 27,578.48

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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.