Home / 71,861.09-99,161.86-40,029.30

Finding the Fourth Proportional to 71,861.09, 99,161.86 and 40,029.30

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Solution

The fourth proportional to 71,861.09, 99,161.86 and 40,029.30 is: 55,236.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,861.09 : 99,161.86 = 40,029.30 : x
  2. Step 2: Convert to fraction form
    71,861.09/99,161.86 = 40,029.30/x
  3. Step 3: Cross multiply
    71,861.09x = 99,161.86 × 40,029.30
  4. Step 4: Simplify right side
    71,861.09x = 3,969,379,842.50
  5. Step 5: Solve for x
    x = 3,969,379,842.50/71,861.09
  6. Step 6: Final answer
    x = 55,236.84

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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.