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Finding the Fourth Proportional to 68,885.46, 103,315.14 and 18,953.10

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Solution

The fourth proportional to 68,885.46, 103,315.14 and 18,953.10 is: 28,426.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,885.46 : 103,315.14 = 18,953.10 : x
  2. Step 2: Convert to fraction form
    68,885.46/103,315.14 = 18,953.10/x
  3. Step 3: Cross multiply
    68,885.46x = 103,315.14 × 18,953.10
  4. Step 4: Simplify right side
    68,885.46x = 1,958,142,179.93
  5. Step 5: Solve for x
    x = 1,958,142,179.93/68,885.46
  6. Step 6: Final answer
    x = 28,426.06

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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.