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Finding the Fourth Proportional to 92,964.50, 128,628.78 and 81,052.64

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Solution

The fourth proportional to 92,964.50, 128,628.78 and 81,052.64 is: 112,147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,964.50 : 128,628.78 = 81,052.64 : x
  2. Step 2: Convert to fraction form
    92,964.50/128,628.78 = 81,052.64/x
  3. Step 3: Cross multiply
    92,964.50x = 128,628.78 × 81,052.64
  4. Step 4: Simplify right side
    92,964.50x = 10,425,702,198.98
  5. Step 5: Solve for x
    x = 10,425,702,198.98/92,964.50
  6. Step 6: Final answer
    x = 112,147.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.