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Finding the Fourth Proportional to 64,708.72, 89,298.67 and 36,028.78

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Solution

The fourth proportional to 64,708.72, 89,298.67 and 36,028.78 is: 49,720.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,708.72 : 89,298.67 = 36,028.78 : x
  2. Step 2: Convert to fraction form
    64,708.72/89,298.67 = 36,028.78/x
  3. Step 3: Cross multiply
    64,708.72x = 89,298.67 × 36,028.78
  4. Step 4: Simplify right side
    64,708.72x = 3,217,322,135.72
  5. Step 5: Solve for x
    x = 3,217,322,135.72/64,708.72
  6. Step 6: Final answer
    x = 49,720.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.