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Finding the Fourth Proportional to 220,496.12, 330,550 and 87,469.80

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Solution

The fourth proportional to 220,496.12, 330,550 and 87,469.80 is: 131,127.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,496.12 : 330,550 = 87,469.80 : x
  2. Step 2: Convert to fraction form
    220,496.12/330,550 = 87,469.80/x
  3. Step 3: Cross multiply
    220,496.12x = 330,550 × 87,469.80
  4. Step 4: Simplify right side
    220,496.12x = 28,913,142,390
  5. Step 5: Solve for x
    x = 28,913,142,390/220,496.12
  6. Step 6: Final answer
    x = 131,127.67

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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.