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Finding the Fourth Proportional to 76,936.40, 115,404.60 and 65,126.60

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Solution

The fourth proportional to 76,936.40, 115,404.60 and 65,126.60 is: 97,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,936.40 : 115,404.60 = 65,126.60 : x
  2. Step 2: Convert to fraction form
    76,936.40/115,404.60 = 65,126.60/x
  3. Step 3: Cross multiply
    76,936.40x = 115,404.60 × 65,126.60
  4. Step 4: Simplify right side
    76,936.40x = 7,515,909,222.36
  5. Step 5: Solve for x
    x = 7,515,909,222.36/76,936.40
  6. Step 6: Final answer
    x = 97,689.90

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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.