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Finding the Fourth Proportional to 91,608, 126,419.04 and 51,864

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Solution

The fourth proportional to 91,608, 126,419.04 and 51,864 is: 71,572.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,608 : 126,419.04 = 51,864 : x
  2. Step 2: Convert to fraction form
    91,608/126,419.04 = 51,864/x
  3. Step 3: Cross multiply
    91,608x = 126,419.04 × 51,864
  4. Step 4: Simplify right side
    91,608x = 6,556,597,090.56
  5. Step 5: Solve for x
    x = 6,556,597,090.56/91,608
  6. Step 6: Final answer
    x = 71,572.32

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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.