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Finding the Fourth Proportional to 71,883.32, 99,199.65 and 39,619.09

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Solution

The fourth proportional to 71,883.32, 99,199.65 and 39,619.09 is: 54,674.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,883.32 : 99,199.65 = 39,619.09 : x
  2. Step 2: Convert to fraction form
    71,883.32/99,199.65 = 39,619.09/x
  3. Step 3: Cross multiply
    71,883.32x = 99,199.65 × 39,619.09
  4. Step 4: Simplify right side
    71,883.32x = 3,930,199,861.32
  5. Step 5: Solve for x
    x = 3,930,199,861.32/71,883.32
  6. Step 6: Final answer
    x = 54,674.71

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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.