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Finding the Fourth Proportional to 117,485.28, 162,213.94 and 72,223.94

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Solution

The fourth proportional to 117,485.28, 162,213.94 and 72,223.94 is: 99,720.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,485.28 : 162,213.94 = 72,223.94 : x
  2. Step 2: Convert to fraction form
    117,485.28/162,213.94 = 72,223.94/x
  3. Step 3: Cross multiply
    117,485.28x = 162,213.94 × 72,223.94
  4. Step 4: Simplify right side
    117,485.28x = 11,715,730,365.54
  5. Step 5: Solve for x
    x = 11,715,730,365.54/117,485.28
  6. Step 6: Final answer
    x = 99,720.84

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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.