Home / 57,123.90-85,676.40-19,172.70

Finding the Fourth Proportional to 57,123.90, 85,676.40 and 19,172.70

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Solution

The fourth proportional to 57,123.90, 85,676.40 and 19,172.70 is: 28,755.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,123.90 : 85,676.40 = 19,172.70 : x
  2. Step 2: Convert to fraction form
    57,123.90/85,676.40 = 19,172.70/x
  3. Step 3: Cross multiply
    57,123.90x = 85,676.40 × 19,172.70
  4. Step 4: Simplify right side
    57,123.90x = 1,642,647,914.28
  5. Step 5: Solve for x
    x = 1,642,647,914.28/57,123.90
  6. Step 6: Final answer
    x = 28,755.88

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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.