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Finding the Fourth Proportional to 68,325.49, 102,503.40 and 20,947.15

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Solution

The fourth proportional to 68,325.49, 102,503.40 and 20,947.15 is: 31,425.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,325.49 : 102,503.40 = 20,947.15 : x
  2. Step 2: Convert to fraction form
    68,325.49/102,503.40 = 20,947.15/x
  3. Step 3: Cross multiply
    68,325.49x = 102,503.40 × 20,947.15
  4. Step 4: Simplify right side
    68,325.49x = 2,147,154,095.31
  5. Step 5: Solve for x
    x = 2,147,154,095.31/68,325.49
  6. Step 6: Final answer
    x = 31,425.37

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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.