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Finding the Fourth Proportional to 118,778.28, 178,136.28 and 43,919.88

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Solution

The fourth proportional to 118,778.28, 178,136.28 and 43,919.88 is: 65,868.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,778.28 : 178,136.28 = 43,919.88 : x
  2. Step 2: Convert to fraction form
    118,778.28/178,136.28 = 43,919.88/x
  3. Step 3: Cross multiply
    118,778.28x = 178,136.28 × 43,919.88
  4. Step 4: Simplify right side
    118,778.28x = 7,823,724,041.25
  5. Step 5: Solve for x
    x = 7,823,724,041.25/118,778.28
  6. Step 6: Final answer
    x = 65,868.31

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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.