Home / 57,430.36-86,057.60-38,640.78

Finding the Fourth Proportional to 57,430.36, 86,057.60 and 38,640.78

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Solution

The fourth proportional to 57,430.36, 86,057.60 and 38,640.78 is: 57,902.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,430.36 : 86,057.60 = 38,640.78 : x
  2. Step 2: Convert to fraction form
    57,430.36/86,057.60 = 38,640.78/x
  3. Step 3: Cross multiply
    57,430.36x = 86,057.60 × 38,640.78
  4. Step 4: Simplify right side
    57,430.36x = 3,325,332,788.93
  5. Step 5: Solve for x
    x = 3,325,332,788.93/57,430.36
  6. Step 6: Final answer
    x = 57,902.00

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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.