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Finding the Fourth Proportional to 66,644.81, 91,969.61 and 36,430.16

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Solution

The fourth proportional to 66,644.81, 91,969.61 and 36,430.16 is: 50,273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,644.81 : 91,969.61 = 36,430.16 : x
  2. Step 2: Convert to fraction form
    66,644.81/91,969.61 = 36,430.16/x
  3. Step 3: Cross multiply
    66,644.81x = 91,969.61 × 36,430.16
  4. Step 4: Simplify right side
    66,644.81x = 3,350,467,170.36
  5. Step 5: Solve for x
    x = 3,350,467,170.36/66,644.81
  6. Step 6: Final answer
    x = 50,273.49

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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.