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Finding the Fourth Proportional to 77,286.80, 115,951.80 and 37,845.20

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Solution

The fourth proportional to 77,286.80, 115,951.80 and 37,845.20 is: 56,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,286.80 : 115,951.80 = 37,845.20 : x
  2. Step 2: Convert to fraction form
    77,286.80/115,951.80 = 37,845.20/x
  3. Step 3: Cross multiply
    77,286.80x = 115,951.80 × 37,845.20
  4. Step 4: Simplify right side
    77,286.80x = 4,388,219,061.36
  5. Step 5: Solve for x
    x = 4,388,219,061.36/77,286.80
  6. Step 6: Final answer
    x = 56,778.38

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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.