Home / 211,985.69-318,010.80-131,958.90

Finding the Fourth Proportional to 211,985.69, 318,010.80 and 131,958.90

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Solution

The fourth proportional to 211,985.69, 318,010.80 and 131,958.90 is: 197,958.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,985.69 : 318,010.80 = 131,958.90 : x
  2. Step 2: Convert to fraction form
    211,985.69/318,010.80 = 131,958.90/x
  3. Step 3: Cross multiply
    211,985.69x = 318,010.80 × 131,958.90
  4. Step 4: Simplify right side
    211,985.69x = 41,964,355,356.12
  5. Step 5: Solve for x
    x = 41,964,355,356.12/211,985.69
  6. Step 6: Final answer
    x = 197,958.44

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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.