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Finding the Fourth Proportional to 215,463.66, 323,212.77 and 57,690.78

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Solution

The fourth proportional to 215,463.66, 323,212.77 and 57,690.78 is: 86,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,463.66 : 323,212.77 = 57,690.78 : x
  2. Step 2: Convert to fraction form
    215,463.66/323,212.77 = 57,690.78/x
  3. Step 3: Cross multiply
    215,463.66x = 323,212.77 × 57,690.78
  4. Step 4: Simplify right side
    215,463.66x = 18,646,396,807.26
  5. Step 5: Solve for x
    x = 18,646,396,807.26/215,463.66
  6. Step 6: Final answer
    x = 86,540.80

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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.