Home / 131,142.84-196,668.90-81,146.40

Finding the Fourth Proportional to 131,142.84, 196,668.90 and 81,146.40

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Solution

The fourth proportional to 131,142.84, 196,668.90 and 81,146.40 is: 121,691.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,142.84 : 196,668.90 = 81,146.40 : x
  2. Step 2: Convert to fraction form
    131,142.84/196,668.90 = 81,146.40/x
  3. Step 3: Cross multiply
    131,142.84x = 196,668.90 × 81,146.40
  4. Step 4: Simplify right side
    131,142.84x = 15,958,973,226.96
  5. Step 5: Solve for x
    x = 15,958,973,226.96/131,142.84
  6. Step 6: Final answer
    x = 121,691.53

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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.