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Finding the Fourth Proportional to 68,537.70, 102,806.55 and 65,913.30

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Solution

The fourth proportional to 68,537.70, 102,806.55 and 65,913.30 is: 98,869.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,537.70 : 102,806.55 = 65,913.30 : x
  2. Step 2: Convert to fraction form
    68,537.70/102,806.55 = 65,913.30/x
  3. Step 3: Cross multiply
    68,537.70x = 102,806.55 × 65,913.30
  4. Step 4: Simplify right side
    68,537.70x = 6,776,318,972.12
  5. Step 5: Solve for x
    x = 6,776,318,972.12/68,537.70
  6. Step 6: Final answer
    x = 98,869.95

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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.