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Finding the Fourth Proportional to 84,815.78, 127,029.90 and 40,473.68

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Solution

The fourth proportional to 84,815.78, 127,029.90 and 40,473.68 is: 60,618.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,815.78 : 127,029.90 = 40,473.68 : x
  2. Step 2: Convert to fraction form
    84,815.78/127,029.90 = 40,473.68/x
  3. Step 3: Cross multiply
    84,815.78x = 127,029.90 × 40,473.68
  4. Step 4: Simplify right side
    84,815.78x = 5,141,366,887.88
  5. Step 5: Solve for x
    x = 5,141,366,887.88/84,815.78
  6. Step 6: Final answer
    x = 60,618.05

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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.