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Finding the Fourth Proportional to 128,897.00, 177,990.84 and 80,581.51

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Solution

The fourth proportional to 128,897.00, 177,990.84 and 80,581.51 is: 111,273.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.00 : 177,990.84 = 80,581.51 : x
  2. Step 2: Convert to fraction form
    128,897.00/177,990.84 = 80,581.51/x
  3. Step 3: Cross multiply
    128,897.00x = 177,990.84 × 80,581.51
  4. Step 4: Simplify right side
    128,897.00x = 14,342,770,208.39
  5. Step 5: Solve for x
    x = 14,342,770,208.39/128,897.00
  6. Step 6: Final answer
    x = 111,273.12

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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.