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Finding the Fourth Proportional to 64,589.76, 89,129.43 and 36,299.70

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Solution

The fourth proportional to 64,589.76, 89,129.43 and 36,299.70 is: 50,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,589.76 : 89,129.43 = 36,299.70 : x
  2. Step 2: Convert to fraction form
    64,589.76/89,129.43 = 36,299.70/x
  3. Step 3: Cross multiply
    64,589.76x = 89,129.43 × 36,299.70
  4. Step 4: Simplify right side
    64,589.76x = 3,235,371,570.17
  5. Step 5: Solve for x
    x = 3,235,371,570.17/64,589.76
  6. Step 6: Final answer
    x = 50,091.09

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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.