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Finding the Fourth Proportional to 64,881.56, 97,313.97 and 20,512.82

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Solution

The fourth proportional to 64,881.56, 97,313.97 and 20,512.82 is: 30,766.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,881.56 : 97,313.97 = 20,512.82 : x
  2. Step 2: Convert to fraction form
    64,881.56/97,313.97 = 20,512.82/x
  3. Step 3: Cross multiply
    64,881.56x = 97,313.97 × 20,512.82
  4. Step 4: Simplify right side
    64,881.56x = 1,996,183,950.10
  5. Step 5: Solve for x
    x = 1,996,183,950.10/64,881.56
  6. Step 6: Final answer
    x = 30,766.58

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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.