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Finding the Fourth Proportional to 208,081.20, 312,121.80 and 185,937.83

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Solution

The fourth proportional to 208,081.20, 312,121.80 and 185,937.83 is: 278,906.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,081.20 : 312,121.80 = 185,937.83 : x
  2. Step 2: Convert to fraction form
    208,081.20/312,121.80 = 185,937.83/x
  3. Step 3: Cross multiply
    208,081.20x = 312,121.80 × 185,937.83
  4. Step 4: Simplify right side
    208,081.20x = 58,035,248,627.09
  5. Step 5: Solve for x
    x = 58,035,248,627.09/208,081.20
  6. Step 6: Final answer
    x = 278,906.74

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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.