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Finding the Fourth Proportional to 187,180.80, 280,771.20 and 74,914.80

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Solution

The fourth proportional to 187,180.80, 280,771.20 and 74,914.80 is: 112,372.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,180.80 : 280,771.20 = 74,914.80 : x
  2. Step 2: Convert to fraction form
    187,180.80/280,771.20 = 74,914.80/x
  3. Step 3: Cross multiply
    187,180.80x = 280,771.20 × 74,914.80
  4. Step 4: Simplify right side
    187,180.80x = 21,033,918,293.76
  5. Step 5: Solve for x
    x = 21,033,918,293.76/187,180.80
  6. Step 6: Final answer
    x = 112,372.20

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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.