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Finding the Fourth Proportional to 136,778.72, 205,528.90 and 73,645.52

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Solution

The fourth proportional to 136,778.72, 205,528.90 and 73,645.52 is: 110,662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,778.72 : 205,528.90 = 73,645.52 : x
  2. Step 2: Convert to fraction form
    136,778.72/205,528.90 = 73,645.52/x
  3. Step 3: Cross multiply
    136,778.72x = 205,528.90 × 73,645.52
  4. Step 4: Simplify right side
    136,778.72x = 15,136,282,715.53
  5. Step 5: Solve for x
    x = 15,136,282,715.53/136,778.72
  6. Step 6: Final answer
    x = 110,662.56

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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.