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Finding the Fourth Proportional to 86,031.98, 128,997.75 and 33,379.96

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Solution

The fourth proportional to 86,031.98, 128,997.75 and 33,379.96 is: 50,050.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,031.98 : 128,997.75 = 33,379.96 : x
  2. Step 2: Convert to fraction form
    86,031.98/128,997.75 = 33,379.96/x
  3. Step 3: Cross multiply
    86,031.98x = 128,997.75 × 33,379.96
  4. Step 4: Simplify right side
    86,031.98x = 4,305,939,735.09
  5. Step 5: Solve for x
    x = 4,305,939,735.09/86,031.98
  6. Step 6: Final answer
    x = 50,050.45

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1.5x scale

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.