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Finding the Fourth Proportional to 220,791.76, 331,323.32 and 87,648.72

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Solution

The fourth proportional to 220,791.76, 331,323.32 and 87,648.72 is: 131,526.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,791.76 : 331,323.32 = 87,648.72 : x
  2. Step 2: Convert to fraction form
    220,791.76/331,323.32 = 87,648.72/x
  3. Step 3: Cross multiply
    220,791.76x = 331,323.32 × 87,648.72
  4. Step 4: Simplify right side
    220,791.76x = 29,040,064,904.15
  5. Step 5: Solve for x
    x = 29,040,064,904.15/220,791.76
  6. Step 6: Final answer
    x = 131,526.94

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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.