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Finding the Fourth Proportional to 128,658.15, 192,921.39 and 53,757.84

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Solution

The fourth proportional to 128,658.15, 192,921.39 and 53,757.84 is: 80,609.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,658.15 : 192,921.39 = 53,757.84 : x
  2. Step 2: Convert to fraction form
    128,658.15/192,921.39 = 53,757.84/x
  3. Step 3: Cross multiply
    128,658.15x = 192,921.39 × 53,757.84
  4. Step 4: Simplify right side
    128,658.15x = 10,371,037,216.20
  5. Step 5: Solve for x
    x = 10,371,037,216.20/128,658.15
  6. Step 6: Final answer
    x = 80,609.25

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1.5x scale

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.