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Finding the Fourth Proportional to 91,986, 126,940.80 and 52,242

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Solution

The fourth proportional to 91,986, 126,940.80 and 52,242 is: 72,094.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,986 : 126,940.80 = 52,242 : x
  2. Step 2: Convert to fraction form
    91,986/126,940.80 = 52,242/x
  3. Step 3: Cross multiply
    91,986x = 126,940.80 × 52,242
  4. Step 4: Simplify right side
    91,986x = 6,631,641,273.60
  5. Step 5: Solve for x
    x = 6,631,641,273.60/91,986
  6. Step 6: Final answer
    x = 72,094.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.