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Finding the Fourth Proportional to 68,919.84, 95,106 and 39,121.44

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Solution

The fourth proportional to 68,919.84, 95,106 and 39,121.44 is: 53,985.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,919.84 : 95,106 = 39,121.44 : x
  2. Step 2: Convert to fraction form
    68,919.84/95,106 = 39,121.44/x
  3. Step 3: Cross multiply
    68,919.84x = 95,106 × 39,121.44
  4. Step 4: Simplify right side
    68,919.84x = 3,720,683,672.64
  5. Step 5: Solve for x
    x = 3,720,683,672.64/68,919.84
  6. Step 6: Final answer
    x = 53,985.67

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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.