Home / 103,665.78-155,310.03-72,008.96

Finding the Fourth Proportional to 103,665.78, 155,310.03 and 72,008.96

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Solution

The fourth proportional to 103,665.78, 155,310.03 and 72,008.96 is: 107,882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665.78 : 155,310.03 = 72,008.96 : x
  2. Step 2: Convert to fraction form
    103,665.78/155,310.03 = 72,008.96/x
  3. Step 3: Cross multiply
    103,665.78x = 155,310.03 × 72,008.96
  4. Step 4: Simplify right side
    103,665.78x = 11,183,713,737.87
  5. Step 5: Solve for x
    x = 11,183,713,737.87/103,665.78
  6. Step 6: Final answer
    x = 107,882.41

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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.