Home / 211,779.20-317,800.40-131,973.80

Finding the Fourth Proportional to 211,779.20, 317,800.40 and 131,973.80

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Solution

The fourth proportional to 211,779.20, 317,800.40 and 131,973.80 is: 198,042.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,779.20 : 317,800.40 = 131,973.80 : x
  2. Step 2: Convert to fraction form
    211,779.20/317,800.40 = 131,973.80/x
  3. Step 3: Cross multiply
    211,779.20x = 317,800.40 × 131,973.80
  4. Step 4: Simplify right side
    211,779.20x = 41,941,326,429.52
  5. Step 5: Solve for x
    x = 41,941,326,429.52/211,779.20
  6. Step 6: Final answer
    x = 198,042.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.