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Finding the Fourth Proportional to 279,361.10, 418,972.23 and 79,683.21

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Solution

The fourth proportional to 279,361.10, 418,972.23 and 79,683.21 is: 119,505.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,361.10 : 418,972.23 = 79,683.21 : x
  2. Step 2: Convert to fraction form
    279,361.10/418,972.23 = 79,683.21/x
  3. Step 3: Cross multiply
    279,361.10x = 418,972.23 × 79,683.21
  4. Step 4: Simplify right side
    279,361.10x = 33,385,052,187.26
  5. Step 5: Solve for x
    x = 33,385,052,187.26/279,361.10
  6. Step 6: Final answer
    x = 119,505.01

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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.