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Finding the Fourth Proportional to 191,339.31, 287,028.42 and 51,107.79

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Solution

The fourth proportional to 191,339.31, 287,028.42 and 51,107.79 is: 76,666.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,339.31 : 287,028.42 = 51,107.79 : x
  2. Step 2: Convert to fraction form
    191,339.31/287,028.42 = 51,107.79/x
  3. Step 3: Cross multiply
    191,339.31x = 287,028.42 × 51,107.79
  4. Step 4: Simplify right side
    191,339.31x = 14,669,388,213.39
  5. Step 5: Solve for x
    x = 14,669,388,213.39/191,339.31
  6. Step 6: Final answer
    x = 76,666.88

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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.