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Finding the Fourth Proportional to 86,996.71, 120,049.78 and 51,179.80

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Solution

The fourth proportional to 86,996.71, 120,049.78 and 51,179.80 is: 70,624.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,996.71 : 120,049.78 = 51,179.80 : x
  2. Step 2: Convert to fraction form
    86,996.71/120,049.78 = 51,179.80/x
  3. Step 3: Cross multiply
    86,996.71x = 120,049.78 × 51,179.80
  4. Step 4: Simplify right side
    86,996.71x = 6,144,123,474.55
  5. Step 5: Solve for x
    x = 6,144,123,474.55/86,996.71
  6. Step 6: Final answer
    x = 70,624.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.