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Finding the Fourth Proportional to 47,422.40, 71,133.60 and 43,620.80

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Solution

The fourth proportional to 47,422.40, 71,133.60 and 43,620.80 is: 65,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,422.40 : 71,133.60 = 43,620.80 : x
  2. Step 2: Convert to fraction form
    47,422.40/71,133.60 = 43,620.80/x
  3. Step 3: Cross multiply
    47,422.40x = 71,133.60 × 43,620.80
  4. Step 4: Simplify right side
    47,422.40x = 3,102,904,538.88
  5. Step 5: Solve for x
    x = 3,102,904,538.88/47,422.40
  6. Step 6: Final answer
    x = 65,431.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.