Home / 100,589.69-138,816.27-55,270.61

Finding the Fourth Proportional to 100,589.69, 138,816.27 and 55,270.61

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Solution

The fourth proportional to 100,589.69, 138,816.27 and 55,270.61 is: 76,274.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,589.69 : 138,816.27 = 55,270.61 : x
  2. Step 2: Convert to fraction form
    100,589.69/138,816.27 = 55,270.61/x
  3. Step 3: Cross multiply
    100,589.69x = 138,816.27 × 55,270.61
  4. Step 4: Simplify right side
    100,589.69x = 7,672,458,950.39
  5. Step 5: Solve for x
    x = 7,672,458,950.39/100,589.69
  6. Step 6: Final answer
    x = 76,274.80

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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.