Home / 78,945.68-108,945.43-43,135.79

Finding the Fourth Proportional to 78,945.68, 108,945.43 and 43,135.79

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Solution

The fourth proportional to 78,945.68, 108,945.43 and 43,135.79 is: 59,527.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,945.68 : 108,945.43 = 43,135.79 : x
  2. Step 2: Convert to fraction form
    78,945.68/108,945.43 = 43,135.79/x
  3. Step 3: Cross multiply
    78,945.68x = 108,945.43 × 43,135.79
  4. Step 4: Simplify right side
    78,945.68x = 4,699,446,537.37
  5. Step 5: Solve for x
    x = 4,699,446,537.37/78,945.68
  6. Step 6: Final answer
    x = 59,527.59

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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.