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Finding the Fourth Proportional to 128,288.34, 192,468.15 and 53,443.80

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Solution

The fourth proportional to 128,288.34, 192,468.15 and 53,443.80 is: 80,180.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288.34 : 192,468.15 = 53,443.80 : x
  2. Step 2: Convert to fraction form
    128,288.34/192,468.15 = 53,443.80/x
  3. Step 3: Cross multiply
    128,288.34x = 192,468.15 × 53,443.80
  4. Step 4: Simplify right side
    128,288.34x = 10,286,229,314.97
  5. Step 5: Solve for x
    x = 10,286,229,314.97/128,288.34
  6. Step 6: Final answer
    x = 80,180.55

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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.