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Finding the Fourth Proportional to 103,042.80, 154,612.80 and 76,798.80

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Solution

The fourth proportional to 103,042.80, 154,612.80 and 76,798.80 is: 115,234.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,042.80 : 154,612.80 = 76,798.80 : x
  2. Step 2: Convert to fraction form
    103,042.80/154,612.80 = 76,798.80/x
  3. Step 3: Cross multiply
    103,042.80x = 154,612.80 × 76,798.80
  4. Step 4: Simplify right side
    103,042.80x = 11,874,077,504.64
  5. Step 5: Solve for x
    x = 11,874,077,504.64/103,042.80
  6. Step 6: Final answer
    x = 115,234.42

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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.