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Finding the Fourth Proportional to 85,074.44, 127,685.41 and 84,877.61

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Solution

The fourth proportional to 85,074.44, 127,685.41 and 84,877.61 is: 127,389.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,074.44 : 127,685.41 = 84,877.61 : x
  2. Step 2: Convert to fraction form
    85,074.44/127,685.41 = 84,877.61/x
  3. Step 3: Cross multiply
    85,074.44x = 127,685.41 × 84,877.61
  4. Step 4: Simplify right side
    85,074.44x = 10,837,631,582.05
  5. Step 5: Solve for x
    x = 10,837,631,582.05/85,074.44
  6. Step 6: Final answer
    x = 127,389.99

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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.