Home / 91,129.19-125,676.43-57,141.39

Finding the Fourth Proportional to 91,129.19, 125,676.43 and 57,141.39

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Solution

The fourth proportional to 91,129.19, 125,676.43 and 57,141.39 is: 78,803.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,129.19 : 125,676.43 = 57,141.39 : x
  2. Step 2: Convert to fraction form
    91,129.19/125,676.43 = 57,141.39/x
  3. Step 3: Cross multiply
    91,129.19x = 125,676.43 × 57,141.39
  4. Step 4: Simplify right side
    91,129.19x = 7,181,324,986.35
  5. Step 5: Solve for x
    x = 7,181,324,986.35/91,129.19
  6. Step 6: Final answer
    x = 78,803.78

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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.