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Finding the Fourth Proportional to 79,941.68, 119,911.98 and 20,777.12

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Solution

The fourth proportional to 79,941.68, 119,911.98 and 20,777.12 is: 31,165.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,941.68 : 119,911.98 = 20,777.12 : x
  2. Step 2: Convert to fraction form
    79,941.68/119,911.98 = 20,777.12/x
  3. Step 3: Cross multiply
    79,941.68x = 119,911.98 × 20,777.12
  4. Step 4: Simplify right side
    79,941.68x = 2,491,425,597.90
  5. Step 5: Solve for x
    x = 2,491,425,597.90/79,941.68
  6. Step 6: Final answer
    x = 31,165.54

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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.