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Finding the Fourth Proportional to 60,939.80, 91,409.70 and 53,163.80

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Solution

The fourth proportional to 60,939.80, 91,409.70 and 53,163.80 is: 79,745.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,939.80 : 91,409.70 = 53,163.80 : x
  2. Step 2: Convert to fraction form
    60,939.80/91,409.70 = 53,163.80/x
  3. Step 3: Cross multiply
    60,939.80x = 91,409.70 × 53,163.80
  4. Step 4: Simplify right side
    60,939.80x = 4,859,687,008.86
  5. Step 5: Solve for x
    x = 4,859,687,008.86/60,939.80
  6. Step 6: Final answer
    x = 79,745.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.