Home / 212,078.09-318,108.83-71,836.71

Finding the Fourth Proportional to 212,078.09, 318,108.83 and 71,836.71

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Solution

The fourth proportional to 212,078.09, 318,108.83 and 71,836.71 is: 107,752.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,078.09 : 318,108.83 = 71,836.71 : x
  2. Step 2: Convert to fraction form
    212,078.09/318,108.83 = 71,836.71/x
  3. Step 3: Cross multiply
    212,078.09x = 318,108.83 × 71,836.71
  4. Step 4: Simplify right side
    212,078.09x = 22,851,891,409.97
  5. Step 5: Solve for x
    x = 22,851,891,409.97/212,078.09
  6. Step 6: Final answer
    x = 107,752.25

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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.