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Finding the Fourth Proportional to 220,604.72, 330,943.52 and 87,485.67

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Solution

The fourth proportional to 220,604.72, 330,943.52 and 87,485.67 is: 131,242.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,604.72 : 330,943.52 = 87,485.67 : x
  2. Step 2: Convert to fraction form
    220,604.72/330,943.52 = 87,485.67/x
  3. Step 3: Cross multiply
    220,604.72x = 330,943.52 × 87,485.67
  4. Step 4: Simplify right side
    220,604.72x = 28,952,815,798.07
  5. Step 5: Solve for x
    x = 28,952,815,798.07/220,604.72
  6. Step 6: Final answer
    x = 131,242.96

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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.