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Finding the Fourth Proportional to 64,811.72, 89,449.44 and 36,520.04

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Solution

The fourth proportional to 64,811.72, 89,449.44 and 36,520.04 is: 50,402.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,811.72 : 89,449.44 = 36,520.04 : x
  2. Step 2: Convert to fraction form
    64,811.72/89,449.44 = 36,520.04/x
  3. Step 3: Cross multiply
    64,811.72x = 89,449.44 × 36,520.04
  4. Step 4: Simplify right side
    64,811.72x = 3,266,697,126.78
  5. Step 5: Solve for x
    x = 3,266,697,126.78/64,811.72
  6. Step 6: Final answer
    x = 50,402.88

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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.