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Finding the Fourth Proportional to 136,758.91, 205,209.42 and 103,469.11

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Solution

The fourth proportional to 136,758.91, 205,209.42 and 103,469.11 is: 155,257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,758.91 : 205,209.42 = 103,469.11 : x
  2. Step 2: Convert to fraction form
    136,758.91/205,209.42 = 103,469.11/x
  3. Step 3: Cross multiply
    136,758.91x = 205,209.42 × 103,469.11
  4. Step 4: Simplify right side
    136,758.91x = 21,232,836,051.02
  5. Step 5: Solve for x
    x = 21,232,836,051.02/136,758.91
  6. Step 6: Final answer
    x = 155,257.42

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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.