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Finding the Fourth Proportional to 64,758.87, 89,369.99 and 36,078.51

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Solution

The fourth proportional to 64,758.87, 89,369.99 and 36,078.51 is: 49,789.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,758.87 : 89,369.99 = 36,078.51 : x
  2. Step 2: Convert to fraction form
    64,758.87/89,369.99 = 36,078.51/x
  3. Step 3: Cross multiply
    64,758.87x = 89,369.99 × 36,078.51
  4. Step 4: Simplify right side
    64,758.87x = 3,224,336,077.91
  5. Step 5: Solve for x
    x = 3,224,336,077.91/64,758.87
  6. Step 6: Final answer
    x = 49,789.88

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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.