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Finding the Fourth Proportional to 68,673.40, 103,010.10 and 53,121.40

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Solution

The fourth proportional to 68,673.40, 103,010.10 and 53,121.40 is: 79,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,673.40 : 103,010.10 = 53,121.40 : x
  2. Step 2: Convert to fraction form
    68,673.40/103,010.10 = 53,121.40/x
  3. Step 3: Cross multiply
    68,673.40x = 103,010.10 × 53,121.40
  4. Step 4: Simplify right side
    68,673.40x = 5,472,040,726.14
  5. Step 5: Solve for x
    x = 5,472,040,726.14/68,673.40
  6. Step 6: Final answer
    x = 79,682.10

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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.