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Finding the Fourth Proportional to 68,776.68, 103,165.41 and 31,310.55

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Solution

The fourth proportional to 68,776.68, 103,165.41 and 31,310.55 is: 46,966.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,776.68 : 103,165.41 = 31,310.55 : x
  2. Step 2: Convert to fraction form
    68,776.68/103,165.41 = 31,310.55/x
  3. Step 3: Cross multiply
    68,776.68x = 103,165.41 × 31,310.55
  4. Step 4: Simplify right side
    68,776.68x = 3,230,165,728.08
  5. Step 5: Solve for x
    x = 3,230,165,728.08/68,776.68
  6. Step 6: Final answer
    x = 46,966.00

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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.