Home / 131,137.72-196,374.41-81,315.12

Finding the Fourth Proportional to 131,137.72, 196,374.41 and 81,315.12

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Solution

The fourth proportional to 131,137.72, 196,374.41 and 81,315.12 is: 121,766.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,137.72 : 196,374.41 = 81,315.12 : x
  2. Step 2: Convert to fraction form
    131,137.72/196,374.41 = 81,315.12/x
  3. Step 3: Cross multiply
    131,137.72x = 196,374.41 × 81,315.12
  4. Step 4: Simplify right side
    131,137.72x = 15,968,209,348.84
  5. Step 5: Solve for x
    x = 15,968,209,348.84/131,137.72
  6. Step 6: Final answer
    x = 121,766.72

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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.