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Finding the Fourth Proportional to 91,667, 126,505.44 and 51,393.68

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Solution

The fourth proportional to 91,667, 126,505.44 and 51,393.68 is: 70,926.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,667 : 126,505.44 = 51,393.68 : x
  2. Step 2: Convert to fraction form
    91,667/126,505.44 = 51,393.68/x
  3. Step 3: Cross multiply
    91,667x = 126,505.44 × 51,393.68
  4. Step 4: Simplify right side
    91,667x = 6,501,580,101.62
  5. Step 5: Solve for x
    x = 6,501,580,101.62/91,667
  6. Step 6: Final answer
    x = 70,926.07

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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.