Home / 287,654,251.38-431,788,431.60-123,972,785.34

Finding the Fourth Proportional to 287,654,251.38, 431,788,431.60 and 123,972,785.34

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Solution

The fourth proportional to 287,654,251.38, 431,788,431.60 and 123,972,785.34 is: 186,091,511.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,654,251.38 : 431,788,431.60 = 123,972,785.34 : x
  2. Step 2: Convert to fraction form
    287,654,251.38/431,788,431.60 = 123,972,785.34/x
  3. Step 3: Cross multiply
    287,654,251.38x = 431,788,431.60 × 123,972,785.34
  4. Step 4: Simplify right side
    287,654,251.38x = 53,530,014,543,042,080
  5. Step 5: Solve for x
    x = 53,530,014,543,042,080/287,654,251.38
  6. Step 6: Final answer
    x = 186,091,511.90

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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.