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Finding the Fourth Proportional to 51,161.76, 76,753.12 and 21,579.68

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Solution

The fourth proportional to 51,161.76, 76,753.12 and 21,579.68 is: 32,373.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,161.76 : 76,753.12 = 21,579.68 : x
  2. Step 2: Convert to fraction form
    51,161.76/76,753.12 = 21,579.68/x
  3. Step 3: Cross multiply
    51,161.76x = 76,753.12 × 21,579.68
  4. Step 4: Simplify right side
    51,161.76x = 1,656,307,768.60
  5. Step 5: Solve for x
    x = 1,656,307,768.60/51,161.76
  6. Step 6: Final answer
    x = 32,373.94

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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.