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Finding the Fourth Proportional to 57,003.50, 78,664.83 and 31,855.34

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Solution

The fourth proportional to 57,003.50, 78,664.83 and 31,855.34 is: 43,960.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,003.50 : 78,664.83 = 31,855.34 : x
  2. Step 2: Convert to fraction form
    57,003.50/78,664.83 = 31,855.34/x
  3. Step 3: Cross multiply
    57,003.50x = 78,664.83 × 31,855.34
  4. Step 4: Simplify right side
    57,003.50x = 2,505,894,905.69
  5. Step 5: Solve for x
    x = 2,505,894,905.69/57,003.50
  6. Step 6: Final answer
    x = 43,960.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.