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Finding the Fourth Proportional to 68,936.64, 103,493.50 and 53,151.70

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Solution

The fourth proportional to 68,936.64, 103,493.50 and 53,151.70 is: 79,795.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,936.64 : 103,493.50 = 53,151.70 : x
  2. Step 2: Convert to fraction form
    68,936.64/103,493.50 = 53,151.70/x
  3. Step 3: Cross multiply
    68,936.64x = 103,493.50 × 53,151.70
  4. Step 4: Simplify right side
    68,936.64x = 5,500,855,463.95
  5. Step 5: Solve for x
    x = 5,500,855,463.95/68,936.64
  6. Step 6: Final answer
    x = 79,795.82

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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.