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Finding the Fourth Proportional to 91,707.69, 126,558 and 50,871.54

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Solution

The fourth proportional to 91,707.69, 126,558 and 50,871.54 is: 70,203.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,707.69 : 126,558 = 50,871.54 : x
  2. Step 2: Convert to fraction form
    91,707.69/126,558 = 50,871.54/x
  3. Step 3: Cross multiply
    91,707.69x = 126,558 × 50,871.54
  4. Step 4: Simplify right side
    91,707.69x = 6,438,200,359.32
  5. Step 5: Solve for x
    x = 6,438,200,359.32/91,707.69
  6. Step 6: Final answer
    x = 70,203.50

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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.