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Finding the Fourth Proportional to 66,221.52, 91,399.98 and 40,749.54

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Solution

The fourth proportional to 66,221.52, 91,399.98 and 40,749.54 is: 56,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.52 : 91,399.98 = 40,749.54 : x
  2. Step 2: Convert to fraction form
    66,221.52/91,399.98 = 40,749.54/x
  3. Step 3: Cross multiply
    66,221.52x = 91,399.98 × 40,749.54
  4. Step 4: Simplify right side
    66,221.52x = 3,724,507,141.01
  5. Step 5: Solve for x
    x = 3,724,507,141.01/66,221.52
  6. Step 6: Final answer
    x = 56,243.15

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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.