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Finding the Fourth Proportional to 128,403.96, 192,395.46 and 123,482.76

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Solution

The fourth proportional to 128,403.96, 192,395.46 and 123,482.76 is: 185,021.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,403.96 : 192,395.46 = 123,482.76 : x
  2. Step 2: Convert to fraction form
    128,403.96/192,395.46 = 123,482.76/x
  3. Step 3: Cross multiply
    128,403.96x = 192,395.46 × 123,482.76
  4. Step 4: Simplify right side
    128,403.96x = 23,757,522,412.27
  5. Step 5: Solve for x
    x = 23,757,522,412.27/128,403.96
  6. Step 6: Final answer
    x = 185,021.73

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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.