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Finding the Fourth Proportional to 57,912.40, 86,803.80 and 29,821.60

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Solution

The fourth proportional to 57,912.40, 86,803.80 and 29,821.60 is: 44,699.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,912.40 : 86,803.80 = 29,821.60 : x
  2. Step 2: Convert to fraction form
    57,912.40/86,803.80 = 29,821.60/x
  3. Step 3: Cross multiply
    57,912.40x = 86,803.80 × 29,821.60
  4. Step 4: Simplify right side
    57,912.40x = 2,588,628,202.08
  5. Step 5: Solve for x
    x = 2,588,628,202.08/57,912.40
  6. Step 6: Final answer
    x = 44,699.03

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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.