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Finding the Fourth Proportional to 68,867.40, 103,301.10 and 68,211.30

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Solution

The fourth proportional to 68,867.40, 103,301.10 and 68,211.30 is: 102,316.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,867.40 : 103,301.10 = 68,211.30 : x
  2. Step 2: Convert to fraction form
    68,867.40/103,301.10 = 68,211.30/x
  3. Step 3: Cross multiply
    68,867.40x = 103,301.10 × 68,211.30
  4. Step 4: Simplify right side
    68,867.40x = 7,046,302,322.43
  5. Step 5: Solve for x
    x = 7,046,302,322.43/68,867.40
  6. Step 6: Final answer
    x = 102,316.95

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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.