Home / 205,840.20-308,760.30-121,640.70

Finding the Fourth Proportional to 205,840.20, 308,760.30 and 121,640.70

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Solution

The fourth proportional to 205,840.20, 308,760.30 and 121,640.70 is: 182,461.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,840.20 : 308,760.30 = 121,640.70 : x
  2. Step 2: Convert to fraction form
    205,840.20/308,760.30 = 121,640.70/x
  3. Step 3: Cross multiply
    205,840.20x = 308,760.30 × 121,640.70
  4. Step 4: Simplify right side
    205,840.20x = 37,557,819,024.21
  5. Step 5: Solve for x
    x = 37,557,819,024.21/205,840.20
  6. Step 6: Final answer
    x = 182,461.05

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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.