Home / 78,040.14-107,741.79-51,229.55

Finding the Fourth Proportional to 78,040.14, 107,741.79 and 51,229.55

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Solution

The fourth proportional to 78,040.14, 107,741.79 and 51,229.55 is: 70,727.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,040.14 : 107,741.79 = 51,229.55 : x
  2. Step 2: Convert to fraction form
    78,040.14/107,741.79 = 51,229.55/x
  3. Step 3: Cross multiply
    78,040.14x = 107,741.79 × 51,229.55
  4. Step 4: Simplify right side
    78,040.14x = 5,519,562,879.19
  5. Step 5: Solve for x
    x = 5,519,562,879.19/78,040.14
  6. Step 6: Final answer
    x = 70,727.23

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1.5x scale

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.