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Finding the Fourth Proportional to 129,704.97, 194,451.78 and 87,054.39

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Solution

The fourth proportional to 129,704.97, 194,451.78 and 87,054.39 is: 130,510.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,704.97 : 194,451.78 = 87,054.39 : x
  2. Step 2: Convert to fraction form
    129,704.97/194,451.78 = 87,054.39/x
  3. Step 3: Cross multiply
    129,704.97x = 194,451.78 × 87,054.39
  4. Step 4: Simplify right side
    129,704.97x = 16,927,881,092.31
  5. Step 5: Solve for x
    x = 16,927,881,092.31/129,704.97
  6. Step 6: Final answer
    x = 130,510.66

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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.