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Finding the Fourth Proportional to 107,380.95, 161,019.51 and 39,866.43

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Solution

The fourth proportional to 107,380.95, 161,019.51 and 39,866.43 is: 59,780.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,380.95 : 161,019.51 = 39,866.43 : x
  2. Step 2: Convert to fraction form
    107,380.95/161,019.51 = 39,866.43/x
  3. Step 3: Cross multiply
    107,380.95x = 161,019.51 × 39,866.43
  4. Step 4: Simplify right side
    107,380.95x = 6,419,273,024.05
  5. Step 5: Solve for x
    x = 6,419,273,024.05/107,380.95
  6. Step 6: Final answer
    x = 59,780.37

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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.