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Finding the Fourth Proportional to 274,658.20, 411,987.30 and 87,688.60

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Solution

The fourth proportional to 274,658.20, 411,987.30 and 87,688.60 is: 131,532.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,658.20 : 411,987.30 = 87,688.60 : x
  2. Step 2: Convert to fraction form
    274,658.20/411,987.30 = 87,688.60/x
  3. Step 3: Cross multiply
    274,658.20x = 411,987.30 × 87,688.60
  4. Step 4: Simplify right side
    274,658.20x = 36,126,589,554.78
  5. Step 5: Solve for x
    x = 36,126,589,554.78/274,658.20
  6. Step 6: Final answer
    x = 131,532.90

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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.