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Finding the Fourth Proportional to 141,891.64, 195,803.88 and 81,420.88

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Solution

The fourth proportional to 141,891.64, 195,803.88 and 81,420.88 is: 112,357.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,891.64 : 195,803.88 = 81,420.88 : x
  2. Step 2: Convert to fraction form
    141,891.64/195,803.88 = 81,420.88/x
  3. Step 3: Cross multiply
    141,891.64x = 195,803.88 × 81,420.88
  4. Step 4: Simplify right side
    141,891.64x = 15,942,524,217.01
  5. Step 5: Solve for x
    x = 15,942,524,217.01/141,891.64
  6. Step 6: Final answer
    x = 112,357.04

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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.