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Finding the Fourth Proportional to 129,616.65, 194,443.20 and 40,860.90

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Solution

The fourth proportional to 129,616.65, 194,443.20 and 40,860.90 is: 61,297.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,616.65 : 194,443.20 = 40,860.90 : x
  2. Step 2: Convert to fraction form
    129,616.65/194,443.20 = 40,860.90/x
  3. Step 3: Cross multiply
    129,616.65x = 194,443.20 × 40,860.90
  4. Step 4: Simplify right side
    129,616.65x = 7,945,124,150.88
  5. Step 5: Solve for x
    x = 7,945,124,150.88/129,616.65
  6. Step 6: Final answer
    x = 61,297.10

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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.