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Finding the Fourth Proportional to 208,746.99, 313,137.90 and 66,612.78

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Solution

The fourth proportional to 208,746.99, 313,137.90 and 66,612.78 is: 99,924.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,746.99 : 313,137.90 = 66,612.78 : x
  2. Step 2: Convert to fraction form
    208,746.99/313,137.90 = 66,612.78/x
  3. Step 3: Cross multiply
    208,746.99x = 313,137.90 × 66,612.78
  4. Step 4: Simplify right side
    208,746.99x = 20,858,986,042.36
  5. Step 5: Solve for x
    x = 20,858,986,042.36/208,746.99
  6. Step 6: Final answer
    x = 99,924.73

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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.