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Finding the Fourth Proportional to 84,940.80, 127,447.65 and 43,387.80

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Solution

The fourth proportional to 84,940.80, 127,447.65 and 43,387.80 is: 65,100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,940.80 : 127,447.65 = 43,387.80 : x
  2. Step 2: Convert to fraction form
    84,940.80/127,447.65 = 43,387.80/x
  3. Step 3: Cross multiply
    84,940.80x = 127,447.65 × 43,387.80
  4. Step 4: Simplify right side
    84,940.80x = 5,529,673,148.67
  5. Step 5: Solve for x
    x = 5,529,673,148.67/84,940.80
  6. Step 6: Final answer
    x = 65,100.32

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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.