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Finding the Fourth Proportional to 76,728.80, 114,963.60 and 37,200.80

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Solution

The fourth proportional to 76,728.80, 114,963.60 and 37,200.80 is: 55,738.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,728.80 : 114,963.60 = 37,200.80 : x
  2. Step 2: Convert to fraction form
    76,728.80/114,963.60 = 37,200.80/x
  3. Step 3: Cross multiply
    76,728.80x = 114,963.60 × 37,200.80
  4. Step 4: Simplify right side
    76,728.80x = 4,276,737,890.88
  5. Step 5: Solve for x
    x = 4,276,737,890.88/76,728.80
  6. Step 6: Final answer
    x = 55,738.37

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1.5x scale

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.