Home / 212,422.68-318,634.03-79,313.32

Finding the Fourth Proportional to 212,422.68, 318,634.03 and 79,313.32

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Solution

The fourth proportional to 212,422.68, 318,634.03 and 79,313.32 is: 118,969.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,422.68 : 318,634.03 = 79,313.32 : x
  2. Step 2: Convert to fraction form
    212,422.68/318,634.03 = 79,313.32/x
  3. Step 3: Cross multiply
    212,422.68x = 318,634.03 × 79,313.32
  4. Step 4: Simplify right side
    212,422.68x = 25,271,922,784.28
  5. Step 5: Solve for x
    x = 25,271,922,784.28/212,422.68
  6. Step 6: Final answer
    x = 118,969.98

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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.