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Finding the Fourth Proportional to 64,835.70, 89,384.49 and 40,950.42

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Solution

The fourth proportional to 64,835.70, 89,384.49 and 40,950.42 is: 56,455.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,835.70 : 89,384.49 = 40,950.42 : x
  2. Step 2: Convert to fraction form
    64,835.70/89,384.49 = 40,950.42/x
  3. Step 3: Cross multiply
    64,835.70x = 89,384.49 × 40,950.42
  4. Step 4: Simplify right side
    64,835.70x = 3,660,332,406.99
  5. Step 5: Solve for x
    x = 3,660,332,406.99/64,835.70
  6. Step 6: Final answer
    x = 56,455.51

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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.