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Finding the Fourth Proportional to 128,655.14, 192,916.89 and 53,754.84

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Solution

The fourth proportional to 128,655.14, 192,916.89 and 53,754.84 is: 80,604.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,655.14 : 192,916.89 = 53,754.84 : x
  2. Step 2: Convert to fraction form
    128,655.14/192,916.89 = 53,754.84/x
  3. Step 3: Cross multiply
    128,655.14x = 192,916.89 × 53,754.84
  4. Step 4: Simplify right side
    128,655.14x = 10,370,216,555.25
  5. Step 5: Solve for x
    x = 10,370,216,555.25/128,655.14
  6. Step 6: Final answer
    x = 80,604.76

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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.