Home / 129,621.20-194,431.80-42,069.20

Finding the Fourth Proportional to 129,621.20, 194,431.80 and 42,069.20

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Solution

The fourth proportional to 129,621.20, 194,431.80 and 42,069.20 is: 63,103.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,621.20 : 194,431.80 = 42,069.20 : x
  2. Step 2: Convert to fraction form
    129,621.20/194,431.80 = 42,069.20/x
  3. Step 3: Cross multiply
    129,621.20x = 194,431.80 × 42,069.20
  4. Step 4: Simplify right side
    129,621.20x = 8,179,590,280.56
  5. Step 5: Solve for x
    x = 8,179,590,280.56/129,621.20
  6. Step 6: Final answer
    x = 63,103.80

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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.