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Finding the Fourth Proportional to 274,611.80, 411,917.70 and 87,642.20

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Solution

The fourth proportional to 274,611.80, 411,917.70 and 87,642.20 is: 131,463.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,611.80 : 411,917.70 = 87,642.20 : x
  2. Step 2: Convert to fraction form
    274,611.80/411,917.70 = 87,642.20/x
  3. Step 3: Cross multiply
    274,611.80x = 411,917.70 × 87,642.20
  4. Step 4: Simplify right side
    274,611.80x = 36,101,373,446.94
  5. Step 5: Solve for x
    x = 36,101,373,446.94/274,611.80
  6. Step 6: Final answer
    x = 131,463.30

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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.