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Finding the Fourth Proportional to 64,919.43, 97,369.38 and 20,540.42

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Solution

The fourth proportional to 64,919.43, 97,369.38 and 20,540.42 is: 30,807.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,919.43 : 97,369.38 = 20,540.42 : x
  2. Step 2: Convert to fraction form
    64,919.43/97,369.38 = 20,540.42/x
  3. Step 3: Cross multiply
    64,919.43x = 97,369.38 × 20,540.42
  4. Step 4: Simplify right side
    64,919.43x = 2,000,007,473.49
  5. Step 5: Solve for x
    x = 2,000,007,473.49/64,919.43
  6. Step 6: Final answer
    x = 30,807.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.