Home / 128,736.82-177,664.10-72,151.84

Finding the Fourth Proportional to 128,736.82, 177,664.10 and 72,151.84

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Solution

The fourth proportional to 128,736.82, 177,664.10 and 72,151.84 is: 99,573.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.82 : 177,664.10 = 72,151.84 : x
  2. Step 2: Convert to fraction form
    128,736.82/177,664.10 = 72,151.84/x
  3. Step 3: Cross multiply
    128,736.82x = 177,664.10 × 72,151.84
  4. Step 4: Simplify right side
    128,736.82x = 12,818,791,716.94
  5. Step 5: Solve for x
    x = 12,818,791,716.94/128,736.82
  6. Step 6: Final answer
    x = 99,573.62

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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.