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Finding the Fourth Proportional to 71,998.94, 99,358.90 and 40,169.64

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Solution

The fourth proportional to 71,998.94, 99,358.90 and 40,169.64 is: 55,434.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,998.94 : 99,358.90 = 40,169.64 : x
  2. Step 2: Convert to fraction form
    71,998.94/99,358.90 = 40,169.64/x
  3. Step 3: Cross multiply
    71,998.94x = 99,358.90 × 40,169.64
  4. Step 4: Simplify right side
    71,998.94x = 3,991,211,243.80
  5. Step 5: Solve for x
    x = 3,991,211,243.80/71,998.94
  6. Step 6: Final answer
    x = 55,434.31

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1.5x scale

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.