Home / 211,511.69-317,188.03-85,109.02

Finding the Fourth Proportional to 211,511.69, 317,188.03 and 85,109.02

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Solution

The fourth proportional to 211,511.69, 317,188.03 and 85,109.02 is: 127,631.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,511.69 : 317,188.03 = 85,109.02 : x
  2. Step 2: Convert to fraction form
    211,511.69/317,188.03 = 85,109.02/x
  3. Step 3: Cross multiply
    211,511.69x = 317,188.03 × 85,109.02
  4. Step 4: Simplify right side
    211,511.69x = 26,995,562,389.03
  5. Step 5: Solve for x
    x = 26,995,562,389.03/211,511.69
  6. Step 6: Final answer
    x = 127,631.54

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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.