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Finding the Fourth Proportional to 79,999.62, 119,997.81 and 20,833.98

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Solution

The fourth proportional to 79,999.62, 119,997.81 and 20,833.98 is: 31,250.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,999.62 : 119,997.81 = 20,833.98 : x
  2. Step 2: Convert to fraction form
    79,999.62/119,997.81 = 20,833.98/x
  3. Step 3: Cross multiply
    79,999.62x = 119,997.81 × 20,833.98
  4. Step 4: Simplify right side
    79,999.62x = 2,500,031,973.58
  5. Step 5: Solve for x
    x = 2,500,031,973.58/79,999.62
  6. Step 6: Final answer
    x = 31,250.55

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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.