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Finding the Fourth Proportional to 64,579.40, 89,108.34 and 36,286.28

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Solution

The fourth proportional to 64,579.40, 89,108.34 and 36,286.28 is: 50,068.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,579.40 : 89,108.34 = 36,286.28 : x
  2. Step 2: Convert to fraction form
    64,579.40/89,108.34 = 36,286.28/x
  3. Step 3: Cross multiply
    64,579.40x = 89,108.34 × 36,286.28
  4. Step 4: Simplify right side
    64,579.40x = 3,233,410,175.58
  5. Step 5: Solve for x
    x = 3,233,410,175.58/64,579.40
  6. Step 6: Final answer
    x = 50,068.76

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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.