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Finding the Fourth Proportional to 64,950.81, 89,622.50 and 39,443.88

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Solution

The fourth proportional to 64,950.81, 89,622.50 and 39,443.88 is: 54,426.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,950.81 : 89,622.50 = 39,443.88 : x
  2. Step 2: Convert to fraction form
    64,950.81/89,622.50 = 39,443.88/x
  3. Step 3: Cross multiply
    64,950.81x = 89,622.50 × 39,443.88
  4. Step 4: Simplify right side
    64,950.81x = 3,535,059,135.30
  5. Step 5: Solve for x
    x = 3,535,059,135.30/64,950.81
  6. Step 6: Final answer
    x = 54,426.71

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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.