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Finding the Fourth Proportional to 68,604.80, 102,712.80 and 61,606.40

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Solution

The fourth proportional to 68,604.80, 102,712.80 and 61,606.40 is: 92,235.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,604.80 : 102,712.80 = 61,606.40 : x
  2. Step 2: Convert to fraction form
    68,604.80/102,712.80 = 61,606.40/x
  3. Step 3: Cross multiply
    68,604.80x = 102,712.80 × 61,606.40
  4. Step 4: Simplify right side
    68,604.80x = 6,327,765,841.92
  5. Step 5: Solve for x
    x = 6,327,765,841.92/68,604.80
  6. Step 6: Final answer
    x = 92,235.03

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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.