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Finding the Fourth Proportional to 68,404.87, 102,607.64 and 30,921.05

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Solution

The fourth proportional to 68,404.87, 102,607.64 and 30,921.05 is: 46,381.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,404.87 : 102,607.64 = 30,921.05 : x
  2. Step 2: Convert to fraction form
    68,404.87/102,607.64 = 30,921.05/x
  3. Step 3: Cross multiply
    68,404.87x = 102,607.64 × 30,921.05
  4. Step 4: Simplify right side
    68,404.87x = 3,172,736,271.66
  5. Step 5: Solve for x
    x = 3,172,736,271.66/68,404.87
  6. Step 6: Final answer
    x = 46,381.73

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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.