Home / 131,519.20-197,181.60-72,421.60

Finding the Fourth Proportional to 131,519.20, 197,181.60 and 72,421.60

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Solution

The fourth proportional to 131,519.20, 197,181.60 and 72,421.60 is: 108,578.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,519.20 : 197,181.60 = 72,421.60 : x
  2. Step 2: Convert to fraction form
    131,519.20/197,181.60 = 72,421.60/x
  3. Step 3: Cross multiply
    131,519.20x = 197,181.60 × 72,421.60
  4. Step 4: Simplify right side
    131,519.20x = 14,280,206,962.56
  5. Step 5: Solve for x
    x = 14,280,206,962.56/131,519.20
  6. Step 6: Final answer
    x = 108,578.88

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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.