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Finding the Fourth Proportional to 91,759.64, 126,620.34 and 51,467

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Solution

The fourth proportional to 91,759.64, 126,620.34 and 51,467 is: 71,019.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,759.64 : 126,620.34 = 51,467 : x
  2. Step 2: Convert to fraction form
    91,759.64/126,620.34 = 51,467/x
  3. Step 3: Cross multiply
    91,759.64x = 126,620.34 × 51,467
  4. Step 4: Simplify right side
    91,759.64x = 6,516,769,038.78
  5. Step 5: Solve for x
    x = 6,516,769,038.78/91,759.64
  6. Step 6: Final answer
    x = 71,019.99

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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.