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Finding the Fourth Proportional to 225,779.05, 311,584.62 and 128,998.83

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Solution

The fourth proportional to 225,779.05, 311,584.62 and 128,998.83 is: 178,023.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,779.05 : 311,584.62 = 128,998.83 : x
  2. Step 2: Convert to fraction form
    225,779.05/311,584.62 = 128,998.83/x
  3. Step 3: Cross multiply
    225,779.05x = 311,584.62 × 128,998.83
  4. Step 4: Simplify right side
    225,779.05x = 40,194,051,325.52
  5. Step 5: Solve for x
    x = 40,194,051,325.52/225,779.05
  6. Step 6: Final answer
    x = 178,023.83

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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.