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Finding the Fourth Proportional to 91,665, 126,502.68 and 51,391.68

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Solution

The fourth proportional to 91,665, 126,502.68 and 51,391.68 is: 70,923.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,665 : 126,502.68 = 51,391.68 : x
  2. Step 2: Convert to fraction form
    91,665/126,502.68 = 51,391.68/x
  3. Step 3: Cross multiply
    91,665x = 126,502.68 × 51,391.68
  4. Step 4: Simplify right side
    91,665x = 6,501,185,249.70
  5. Step 5: Solve for x
    x = 6,501,185,249.70/91,665
  6. Step 6: Final answer
    x = 70,923.31

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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.