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Finding the Fourth Proportional to 128,956.54, 193,425.51 and 34,184.56

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Solution

The fourth proportional to 128,956.54, 193,425.51 and 34,184.56 is: 51,274.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,956.54 : 193,425.51 = 34,184.56 : x
  2. Step 2: Convert to fraction form
    128,956.54/193,425.51 = 34,184.56/x
  3. Step 3: Cross multiply
    128,956.54x = 193,425.51 × 34,184.56
  4. Step 4: Simplify right side
    128,956.54x = 6,612,166,037.59
  5. Step 5: Solve for x
    x = 6,612,166,037.59/128,956.54
  6. Step 6: Final answer
    x = 51,274.38

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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.