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Finding the Fourth Proportional to 136,963.16, 205,491.44 and 73,789.76

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Solution

The fourth proportional to 136,963.16, 205,491.44 and 73,789.76 is: 110,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,963.16 : 205,491.44 = 73,789.76 : x
  2. Step 2: Convert to fraction form
    136,963.16/205,491.44 = 73,789.76/x
  3. Step 3: Cross multiply
    136,963.16x = 205,491.44 × 73,789.76
  4. Step 4: Simplify right side
    136,963.16x = 15,163,162,643.25
  5. Step 5: Solve for x
    x = 15,163,162,643.25/136,963.16
  6. Step 6: Final answer
    x = 110,709.79

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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.