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Finding the Fourth Proportional to 84,939.80, 127,446.15 and 43,386.80

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Solution

The fourth proportional to 84,939.80, 127,446.15 and 43,386.80 is: 65,098.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,939.80 : 127,446.15 = 43,386.80 : x
  2. Step 2: Convert to fraction form
    84,939.80/127,446.15 = 43,386.80/x
  3. Step 3: Cross multiply
    84,939.80x = 127,446.15 × 43,386.80
  4. Step 4: Simplify right side
    84,939.80x = 5,529,480,620.82
  5. Step 5: Solve for x
    x = 5,529,480,620.82/84,939.80
  6. Step 6: Final answer
    x = 65,098.82

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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.