Home / 78,744.20-118,140.15-28,136.60

Finding the Fourth Proportional to 78,744.20, 118,140.15 and 28,136.60

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Solution

The fourth proportional to 78,744.20, 118,140.15 and 28,136.60 is: 42,213.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,744.20 : 118,140.15 = 28,136.60 : x
  2. Step 2: Convert to fraction form
    78,744.20/118,140.15 = 28,136.60/x
  3. Step 3: Cross multiply
    78,744.20x = 118,140.15 × 28,136.60
  4. Step 4: Simplify right side
    78,744.20x = 3,324,061,553.79
  5. Step 5: Solve for x
    x = 3,324,061,553.79/78,744.20
  6. Step 6: Final answer
    x = 42,213.42

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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.