Home / 57,138.69-85,708.05-19,709.49

Finding the Fourth Proportional to 57,138.69, 85,708.05 and 19,709.49

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Solution

The fourth proportional to 57,138.69, 85,708.05 and 19,709.49 is: 29,564.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,138.69 : 85,708.05 = 19,709.49 : x
  2. Step 2: Convert to fraction form
    57,138.69/85,708.05 = 19,709.49/x
  3. Step 3: Cross multiply
    57,138.69x = 85,708.05 × 19,709.49
  4. Step 4: Simplify right side
    57,138.69x = 1,689,261,954.39
  5. Step 5: Solve for x
    x = 1,689,261,954.39/57,138.69
  6. Step 6: Final answer
    x = 29,564.24

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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.