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Finding the Fourth Proportional to 128,666.86, 192,992.97 and 38,707.66

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Solution

The fourth proportional to 128,666.86, 192,992.97 and 38,707.66 is: 58,059.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,666.86 : 192,992.97 = 38,707.66 : x
  2. Step 2: Convert to fraction form
    128,666.86/192,992.97 = 38,707.66/x
  3. Step 3: Cross multiply
    128,666.86x = 192,992.97 × 38,707.66
  4. Step 4: Simplify right side
    128,666.86x = 7,470,306,265.15
  5. Step 5: Solve for x
    x = 7,470,306,265.15/128,666.86
  6. Step 6: Final answer
    x = 58,059.29

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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.