Home / 128,650.64-192,975.96-39,902

Finding the Fourth Proportional to 128,650.64, 192,975.96 and 39,902

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Solution

The fourth proportional to 128,650.64, 192,975.96 and 39,902 is: 59,853

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,650.64 : 192,975.96 = 39,902 : x
  2. Step 2: Convert to fraction form
    128,650.64/192,975.96 = 39,902/x
  3. Step 3: Cross multiply
    128,650.64x = 192,975.96 × 39,902
  4. Step 4: Simplify right side
    128,650.64x = 7,700,126,755.92
  5. Step 5: Solve for x
    x = 7,700,126,755.92/128,650.64
  6. Step 6: Final answer
    x = 59,853

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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.