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Finding the Fourth Proportional to 218,956.73, 302,162.47 and 128,366.33

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Solution

The fourth proportional to 218,956.73, 302,162.47 and 128,366.33 is: 177,146.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,956.73 : 302,162.47 = 128,366.33 : x
  2. Step 2: Convert to fraction form
    218,956.73/302,162.47 = 128,366.33/x
  3. Step 3: Cross multiply
    218,956.73x = 302,162.47 × 128,366.33
  4. Step 4: Simplify right side
    218,956.73x = 38,787,485,505.91
  5. Step 5: Solve for x
    x = 38,787,485,505.91/218,956.73
  6. Step 6: Final answer
    x = 177,146.81

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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.