Home / 212,078.66-318,065.52-126,712.82

Finding the Fourth Proportional to 212,078.66, 318,065.52 and 126,712.82

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Solution

The fourth proportional to 212,078.66, 318,065.52 and 126,712.82 is: 190,037.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,078.66 : 318,065.52 = 126,712.82 : x
  2. Step 2: Convert to fraction form
    212,078.66/318,065.52 = 126,712.82/x
  3. Step 3: Cross multiply
    212,078.66x = 318,065.52 × 126,712.82
  4. Step 4: Simplify right side
    212,078.66x = 40,302,978,983.97
  5. Step 5: Solve for x
    x = 40,302,978,983.97/212,078.66
  6. Step 6: Final answer
    x = 190,037.88

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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.