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Finding the Fourth Proportional to 103,439.40, 155,187.90 and 50,850.60

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Solution

The fourth proportional to 103,439.40, 155,187.90 and 50,850.60 is: 76,290.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,439.40 : 155,187.90 = 50,850.60 : x
  2. Step 2: Convert to fraction form
    103,439.40/155,187.90 = 50,850.60/x
  3. Step 3: Cross multiply
    103,439.40x = 155,187.90 × 50,850.60
  4. Step 4: Simplify right side
    103,439.40x = 7,891,397,827.74
  5. Step 5: Solve for x
    x = 7,891,397,827.74/103,439.40
  6. Step 6: Final answer
    x = 76,290.06

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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.