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Finding the Fourth Proportional to 57,210.99, 78,944.79 and 31,716.64

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Solution

The fourth proportional to 57,210.99, 78,944.79 and 31,716.64 is: 43,765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,210.99 : 78,944.79 = 31,716.64 : x
  2. Step 2: Convert to fraction form
    57,210.99/78,944.79 = 31,716.64/x
  3. Step 3: Cross multiply
    57,210.99x = 78,944.79 × 31,716.64
  4. Step 4: Simplify right side
    57,210.99x = 2,503,863,484.31
  5. Step 5: Solve for x
    x = 2,503,863,484.31/57,210.99
  6. Step 6: Final answer
    x = 43,765.43

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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.