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Finding the Fourth Proportional to 76,914.40, 115,115.60 and 55,794.40

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Solution

The fourth proportional to 76,914.40, 115,115.60 and 55,794.40 is: 83,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,914.40 : 115,115.60 = 55,794.40 : x
  2. Step 2: Convert to fraction form
    76,914.40/115,115.60 = 55,794.40/x
  3. Step 3: Cross multiply
    76,914.40x = 115,115.60 × 55,794.40
  4. Step 4: Simplify right side
    76,914.40x = 6,422,805,832.64
  5. Step 5: Solve for x
    x = 6,422,805,832.64/76,914.40
  6. Step 6: Final answer
    x = 83,505.90

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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.