Home / 105,489.16-145,575.26-57,745.56

Finding the Fourth Proportional to 105,489.16, 145,575.26 and 57,745.56

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Solution

The fourth proportional to 105,489.16, 145,575.26 and 57,745.56 is: 79,688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,489.16 : 145,575.26 = 57,745.56 : x
  2. Step 2: Convert to fraction form
    105,489.16/145,575.26 = 57,745.56/x
  3. Step 3: Cross multiply
    105,489.16x = 145,575.26 × 57,745.56
  4. Step 4: Simplify right side
    105,489.16x = 8,406,324,910.85
  5. Step 5: Solve for x
    x = 8,406,324,910.85/105,489.16
  6. Step 6: Final answer
    x = 79,688.99

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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.