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Finding the Fourth Proportional to 141,903.10, 212,563.05 and 71,821.90

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Solution

The fourth proportional to 141,903.10, 212,563.05 and 71,821.90 is: 107,585.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,903.10 : 212,563.05 = 71,821.90 : x
  2. Step 2: Convert to fraction form
    141,903.10/212,563.05 = 71,821.90/x
  3. Step 3: Cross multiply
    141,903.10x = 212,563.05 × 71,821.90
  4. Step 4: Simplify right side
    141,903.10x = 15,266,682,120.80
  5. Step 5: Solve for x
    x = 15,266,682,120.80/141,903.10
  6. Step 6: Final answer
    x = 107,585.26

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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.