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Finding the Fourth Proportional to 129,941.88, 194,990.57 and 56,069.88

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Solution

The fourth proportional to 129,941.88, 194,990.57 and 56,069.88 is: 84,138.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,941.88 : 194,990.57 = 56,069.88 : x
  2. Step 2: Convert to fraction form
    129,941.88/194,990.57 = 56,069.88/x
  3. Step 3: Cross multiply
    129,941.88x = 194,990.57 × 56,069.88
  4. Step 4: Simplify right side
    129,941.88x = 10,933,097,861.03
  5. Step 5: Solve for x
    x = 10,933,097,861.03/129,941.88
  6. Step 6: Final answer
    x = 84,138.37

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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.