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Finding the Fourth Proportional to 103,956.40, 143,498.54 and 80,940.52

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Solution

The fourth proportional to 103,956.40, 143,498.54 and 80,940.52 is: 111,728.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,956.40 : 143,498.54 = 80,940.52 : x
  2. Step 2: Convert to fraction form
    103,956.40/143,498.54 = 80,940.52/x
  3. Step 3: Cross multiply
    103,956.40x = 143,498.54 × 80,940.52
  4. Step 4: Simplify right side
    103,956.40x = 11,614,846,446.84
  5. Step 5: Solve for x
    x = 11,614,846,446.84/103,956.40
  6. Step 6: Final answer
    x = 111,728.06

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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.