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Finding the Fourth Proportional to 84,697.25, 127,045.87 and 80,665.88

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Solution

The fourth proportional to 84,697.25, 127,045.87 and 80,665.88 is: 120,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,697.25 : 127,045.87 = 80,665.88 : x
  2. Step 2: Convert to fraction form
    84,697.25/127,045.87 = 80,665.88/x
  3. Step 3: Cross multiply
    84,697.25x = 127,045.87 × 80,665.88
  4. Step 4: Simplify right side
    84,697.25x = 10,248,266,067.02
  5. Step 5: Solve for x
    x = 10,248,266,067.02/84,697.25
  6. Step 6: Final answer
    x = 120,998.81

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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.