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Finding the Fourth Proportional to 56,651.70, 84,989.70 and 17,212.80

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Solution

The fourth proportional to 56,651.70, 84,989.70 and 17,212.80 is: 25,822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,651.70 : 84,989.70 = 17,212.80 : x
  2. Step 2: Convert to fraction form
    56,651.70/84,989.70 = 17,212.80/x
  3. Step 3: Cross multiply
    56,651.70x = 84,989.70 × 17,212.80
  4. Step 4: Simplify right side
    56,651.70x = 1,462,910,708.16
  5. Step 5: Solve for x
    x = 1,462,910,708.16/56,651.70
  6. Step 6: Final answer
    x = 25,822.89

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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.