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Finding the Fourth Proportional to 77,375.66, 115,914.04 and 57,076.66

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Solution

The fourth proportional to 77,375.66, 115,914.04 and 57,076.66 is: 85,504.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,375.66 : 115,914.04 = 57,076.66 : x
  2. Step 2: Convert to fraction form
    77,375.66/115,914.04 = 57,076.66/x
  3. Step 3: Cross multiply
    77,375.66x = 115,914.04 × 57,076.66
  4. Step 4: Simplify right side
    77,375.66x = 6,615,985,921.55
  5. Step 5: Solve for x
    x = 6,615,985,921.55/77,375.66
  6. Step 6: Final answer
    x = 85,504.74

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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.