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Finding the Fourth Proportional to 64,816.87, 89,454.50 and 40,942.39

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Solution

The fourth proportional to 64,816.87, 89,454.50 and 40,942.39 is: 56,505.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,816.87 : 89,454.50 = 40,942.39 : x
  2. Step 2: Convert to fraction form
    64,816.87/89,454.50 = 40,942.39/x
  3. Step 3: Cross multiply
    64,816.87x = 89,454.50 × 40,942.39
  4. Step 4: Simplify right side
    64,816.87x = 3,662,481,026.26
  5. Step 5: Solve for x
    x = 3,662,481,026.26/64,816.87
  6. Step 6: Final answer
    x = 56,505.06

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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.