Home / 57,235.05-78,986.90-31,739.69

Finding the Fourth Proportional to 57,235.05, 78,986.90 and 31,739.69

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Solution

The fourth proportional to 57,235.05, 78,986.90 and 31,739.69 is: 43,802.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,235.05 : 78,986.90 = 31,739.69 : x
  2. Step 2: Convert to fraction form
    57,235.05/78,986.90 = 31,739.69/x
  3. Step 3: Cross multiply
    57,235.05x = 78,986.90 × 31,739.69
  4. Step 4: Simplify right side
    57,235.05x = 2,507,019,996.88
  5. Step 5: Solve for x
    x = 2,507,019,996.88/57,235.05
  6. Step 6: Final answer
    x = 43,802.18

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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.