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Finding the Fourth Proportional to 128,842.51, 193,260.59 and 49,956.76

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Solution

The fourth proportional to 128,842.51, 193,260.59 and 49,956.76 is: 74,933.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,842.51 : 193,260.59 = 49,956.76 : x
  2. Step 2: Convert to fraction form
    128,842.51/193,260.59 = 49,956.76/x
  3. Step 3: Cross multiply
    128,842.51x = 193,260.59 × 49,956.76
  4. Step 4: Simplify right side
    128,842.51x = 9,654,672,553.83
  5. Step 5: Solve for x
    x = 9,654,672,553.83/128,842.51
  6. Step 6: Final answer
    x = 74,933.91

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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.