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Finding the Fourth Proportional to 128,253.48, 177,039.20 and 114,801

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Solution

The fourth proportional to 128,253.48, 177,039.20 and 114,801 is: 158,469.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,253.48 : 177,039.20 = 114,801 : x
  2. Step 2: Convert to fraction form
    128,253.48/177,039.20 = 114,801/x
  3. Step 3: Cross multiply
    128,253.48x = 177,039.20 × 114,801
  4. Step 4: Simplify right side
    128,253.48x = 20,324,277,199.20
  5. Step 5: Solve for x
    x = 20,324,277,199.20/128,253.48
  6. Step 6: Final answer
    x = 158,469.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.