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Finding the Fourth Proportional to 64,786.60, 89,374.96 and 37,912.64

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Solution

The fourth proportional to 64,786.60, 89,374.96 and 37,912.64 is: 52,301.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,786.60 : 89,374.96 = 37,912.64 : x
  2. Step 2: Convert to fraction form
    64,786.60/89,374.96 = 37,912.64/x
  3. Step 3: Cross multiply
    64,786.60x = 89,374.96 × 37,912.64
  4. Step 4: Simplify right side
    64,786.60x = 3,388,440,683.49
  5. Step 5: Solve for x
    x = 3,388,440,683.49/64,786.60
  6. Step 6: Final answer
    x = 52,301.57

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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.