Home / 212,021.37-317,983.46-126,656.28

Finding the Fourth Proportional to 212,021.37, 317,983.46 and 126,656.28

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Solution

The fourth proportional to 212,021.37, 317,983.46 and 126,656.28 is: 189,955.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,021.37 : 317,983.46 = 126,656.28 : x
  2. Step 2: Convert to fraction form
    212,021.37/317,983.46 = 126,656.28/x
  3. Step 3: Cross multiply
    212,021.37x = 317,983.46 × 126,656.28
  4. Step 4: Simplify right side
    212,021.37x = 40,274,601,511.85
  5. Step 5: Solve for x
    x = 40,274,601,511.85/212,021.37
  6. Step 6: Final answer
    x = 189,955.39

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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.