Home / 57,160.78-85,745.32-19,720.35

Finding the Fourth Proportional to 57,160.78, 85,745.32 and 19,720.35

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Solution

The fourth proportional to 57,160.78, 85,745.32 and 19,720.35 is: 29,581.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,160.78 : 85,745.32 = 19,720.35 : x
  2. Step 2: Convert to fraction form
    57,160.78/85,745.32 = 19,720.35/x
  3. Step 3: Cross multiply
    57,160.78x = 85,745.32 × 19,720.35
  4. Step 4: Simplify right side
    57,160.78x = 1,690,927,671.96
  5. Step 5: Solve for x
    x = 1,690,927,671.96/57,160.78
  6. Step 6: Final answer
    x = 29,581.96

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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.