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Finding the Fourth Proportional to 57,362.40, 79,161.12 and 31,871.10

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Solution

The fourth proportional to 57,362.40, 79,161.12 and 31,871.10 is: 43,982.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,362.40 : 79,161.12 = 31,871.10 : x
  2. Step 2: Convert to fraction form
    57,362.40/79,161.12 = 31,871.10/x
  3. Step 3: Cross multiply
    57,362.40x = 79,161.12 × 31,871.10
  4. Step 4: Simplify right side
    57,362.40x = 2,522,951,971.63
  5. Step 5: Solve for x
    x = 2,522,951,971.63/57,362.40
  6. Step 6: Final answer
    x = 43,982.68

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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.