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Finding the Fourth Proportional to 136,809.72, 205,043.25 and 73,474.20

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Solution

The fourth proportional to 136,809.72, 205,043.25 and 73,474.20 is: 110,119.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,809.72 : 205,043.25 = 73,474.20 : x
  2. Step 2: Convert to fraction form
    136,809.72/205,043.25 = 73,474.20/x
  3. Step 3: Cross multiply
    136,809.72x = 205,043.25 × 73,474.20
  4. Step 4: Simplify right side
    136,809.72x = 15,065,387,733.93
  5. Step 5: Solve for x
    x = 15,065,387,733.93/136,809.72
  6. Step 6: Final answer
    x = 110,119.28

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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.