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Finding the Fourth Proportional to 191,991.68, 264,955.78 and 107,125.28

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Solution

The fourth proportional to 191,991.68, 264,955.78 and 107,125.28 is: 147,836.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,991.68 : 264,955.78 = 107,125.28 : x
  2. Step 2: Convert to fraction form
    191,991.68/264,955.78 = 107,125.28/x
  3. Step 3: Cross multiply
    191,991.68x = 264,955.78 × 107,125.28
  4. Step 4: Simplify right side
    191,991.68x = 28,383,462,120.12
  5. Step 5: Solve for x
    x = 28,383,462,120.12/191,991.68
  6. Step 6: Final answer
    x = 147,836.94

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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.