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Finding the Fourth Proportional to 100,872.84, 139,162.74 and 60,028.80

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Solution

The fourth proportional to 100,872.84, 139,162.74 and 60,028.80 is: 82,814.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,872.84 : 139,162.74 = 60,028.80 : x
  2. Step 2: Convert to fraction form
    100,872.84/139,162.74 = 60,028.80/x
  3. Step 3: Cross multiply
    100,872.84x = 139,162.74 × 60,028.80
  4. Step 4: Simplify right side
    100,872.84x = 8,353,772,286.91
  5. Step 5: Solve for x
    x = 8,353,772,286.91/100,872.84
  6. Step 6: Final answer
    x = 82,814.88

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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.