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Finding the Fourth Proportional to 127,309.12, 175,687.79 and 69,949.64

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Solution

The fourth proportional to 127,309.12, 175,687.79 and 69,949.64 is: 96,531.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,309.12 : 175,687.79 = 69,949.64 : x
  2. Step 2: Convert to fraction form
    127,309.12/175,687.79 = 69,949.64/x
  3. Step 3: Cross multiply
    127,309.12x = 175,687.79 × 69,949.64
  4. Step 4: Simplify right side
    127,309.12x = 12,289,297,752.37
  5. Step 5: Solve for x
    x = 12,289,297,752.37/127,309.12
  6. Step 6: Final answer
    x = 96,531.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.