Home / 137,576.80-189,867.18-80,999.20

Finding the Fourth Proportional to 137,576.80, 189,867.18 and 80,999.20

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Solution

The fourth proportional to 137,576.80, 189,867.18 and 80,999.20 is: 111,785.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,576.80 : 189,867.18 = 80,999.20 : x
  2. Step 2: Convert to fraction form
    137,576.80/189,867.18 = 80,999.20/x
  3. Step 3: Cross multiply
    137,576.80x = 189,867.18 × 80,999.20
  4. Step 4: Simplify right side
    137,576.80x = 15,379,089,686.26
  5. Step 5: Solve for x
    x = 15,379,089,686.26/137,576.80
  6. Step 6: Final answer
    x = 111,785.49

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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.