Home / 212,004.80-317,809.50-71,665.28

Finding the Fourth Proportional to 212,004.80, 317,809.50 and 71,665.28

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Solution

The fourth proportional to 212,004.80, 317,809.50 and 71,665.28 is: 107,431.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,004.80 : 317,809.50 = 71,665.28 : x
  2. Step 2: Convert to fraction form
    212,004.80/317,809.50 = 71,665.28/x
  3. Step 3: Cross multiply
    212,004.80x = 317,809.50 × 71,665.28
  4. Step 4: Simplify right side
    212,004.80x = 22,775,906,804.16
  5. Step 5: Solve for x
    x = 22,775,906,804.16/212,004.80
  6. Step 6: Final answer
    x = 107,431.09

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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.