Home / 205,836.60-308,678.10-81,151.80

Finding the Fourth Proportional to 205,836.60, 308,678.10 and 81,151.80

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Solution

The fourth proportional to 205,836.60, 308,678.10 and 81,151.80 is: 121,697.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,836.60 : 308,678.10 = 81,151.80 : x
  2. Step 2: Convert to fraction form
    205,836.60/308,678.10 = 81,151.80/x
  3. Step 3: Cross multiply
    205,836.60x = 308,678.10 × 81,151.80
  4. Step 4: Simplify right side
    205,836.60x = 25,049,783,435.58
  5. Step 5: Solve for x
    x = 25,049,783,435.58/205,836.60
  6. Step 6: Final answer
    x = 121,697.42

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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.