Home / 225,619.80-311,315.85-128,779.44

Finding the Fourth Proportional to 225,619.80, 311,315.85 and 128,779.44

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Solution

The fourth proportional to 225,619.80, 311,315.85 and 128,779.44 is: 177,693.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,619.80 : 311,315.85 = 128,779.44 : x
  2. Step 2: Convert to fraction form
    225,619.80/311,315.85 = 128,779.44/x
  3. Step 3: Cross multiply
    225,619.80x = 311,315.85 × 128,779.44
  4. Step 4: Simplify right side
    225,619.80x = 40,091,080,826.12
  5. Step 5: Solve for x
    x = 40,091,080,826.12/225,619.80
  6. Step 6: Final answer
    x = 177,693.10

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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.