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Finding the Fourth Proportional to 64,835.68, 89,472 and 36,540.80

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Solution

The fourth proportional to 64,835.68, 89,472 and 36,540.80 is: 50,425.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,835.68 : 89,472 = 36,540.80 : x
  2. Step 2: Convert to fraction form
    64,835.68/89,472 = 36,540.80/x
  3. Step 3: Cross multiply
    64,835.68x = 89,472 × 36,540.80
  4. Step 4: Simplify right side
    64,835.68x = 3,269,378,457.60
  5. Step 5: Solve for x
    x = 3,269,378,457.60/64,835.68
  6. Step 6: Final answer
    x = 50,425.61

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1.5x scale

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.