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Finding the Fourth Proportional to 64,974.66, 89,662.50 and 40,788.64

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Solution

The fourth proportional to 64,974.66, 89,662.50 and 40,788.64 is: 56,286.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,974.66 : 89,662.50 = 40,788.64 : x
  2. Step 2: Convert to fraction form
    64,974.66/89,662.50 = 40,788.64/x
  3. Step 3: Cross multiply
    64,974.66x = 89,662.50 × 40,788.64
  4. Step 4: Simplify right side
    64,974.66x = 3,657,211,434
  5. Step 5: Solve for x
    x = 3,657,211,434/64,974.66
  6. Step 6: Final answer
    x = 56,286.73

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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.