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Finding the Fourth Proportional to 68,678.16, 103,000.59 and 18,758.49

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Solution

The fourth proportional to 68,678.16, 103,000.59 and 18,758.49 is: 28,133.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,678.16 : 103,000.59 = 18,758.49 : x
  2. Step 2: Convert to fraction form
    68,678.16/103,000.59 = 18,758.49/x
  3. Step 3: Cross multiply
    68,678.16x = 103,000.59 × 18,758.49
  4. Step 4: Simplify right side
    68,678.16x = 1,932,135,537.51
  5. Step 5: Solve for x
    x = 1,932,135,537.51/68,678.16
  6. Step 6: Final answer
    x = 28,133.19

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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.