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Finding the Fourth Proportional to 86,079.44, 128,841.40 and 44,469.20

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Solution

The fourth proportional to 86,079.44, 128,841.40 and 44,469.20 is: 66,560.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,079.44 : 128,841.40 = 44,469.20 : x
  2. Step 2: Convert to fraction form
    86,079.44/128,841.40 = 44,469.20/x
  3. Step 3: Cross multiply
    86,079.44x = 128,841.40 × 44,469.20
  4. Step 4: Simplify right side
    86,079.44x = 5,729,473,984.88
  5. Step 5: Solve for x
    x = 5,729,473,984.88/86,079.44
  6. Step 6: Final answer
    x = 66,560.31

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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.