Home / 100,403.27-138,555.33-55,081.60

Finding the Fourth Proportional to 100,403.27, 138,555.33 and 55,081.60

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Solution

The fourth proportional to 100,403.27, 138,555.33 and 55,081.60 is: 76,011.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,403.27 : 138,555.33 = 55,081.60 : x
  2. Step 2: Convert to fraction form
    100,403.27/138,555.33 = 55,081.60/x
  3. Step 3: Cross multiply
    100,403.27x = 138,555.33 × 55,081.60
  4. Step 4: Simplify right side
    100,403.27x = 7,631,848,711.98
  5. Step 5: Solve for x
    x = 7,631,848,711.98/100,403.27
  6. Step 6: Final answer
    x = 76,011.95

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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.