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Finding the Fourth Proportional to 91,421.49, 126,173.34 and 51,137.49

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Solution

The fourth proportional to 91,421.49, 126,173.34 and 51,137.49 is: 70,576.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,421.49 : 126,173.34 = 51,137.49 : x
  2. Step 2: Convert to fraction form
    91,421.49/126,173.34 = 51,137.49/x
  3. Step 3: Cross multiply
    91,421.49x = 126,173.34 × 51,137.49
  4. Step 4: Simplify right side
    91,421.49x = 6,452,187,912.52
  5. Step 5: Solve for x
    x = 6,452,187,912.52/91,421.49
  6. Step 6: Final answer
    x = 70,576.27

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1.5x scale

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.