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Finding the Fourth Proportional to 129,855.40, 194,783.10 and 123,731.80

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Solution

The fourth proportional to 129,855.40, 194,783.10 and 123,731.80 is: 185,597.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,855.40 : 194,783.10 = 123,731.80 : x
  2. Step 2: Convert to fraction form
    129,855.40/194,783.10 = 123,731.80/x
  3. Step 3: Cross multiply
    129,855.40x = 194,783.10 × 123,731.80
  4. Step 4: Simplify right side
    129,855.40x = 24,100,863,572.58
  5. Step 5: Solve for x
    x = 24,100,863,572.58/129,855.40
  6. Step 6: Final answer
    x = 185,597.70

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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.