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Finding the Fourth Proportional to 56,651.80, 84,923.70 and 21,103.60

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Solution

The fourth proportional to 56,651.80, 84,923.70 and 21,103.60 is: 31,635.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,651.80 : 84,923.70 = 21,103.60 : x
  2. Step 2: Convert to fraction form
    56,651.80/84,923.70 = 21,103.60/x
  3. Step 3: Cross multiply
    56,651.80x = 84,923.70 × 21,103.60
  4. Step 4: Simplify right side
    56,651.80x = 1,792,195,795.32
  5. Step 5: Solve for x
    x = 1,792,195,795.32/56,651.80
  6. Step 6: Final answer
    x = 31,635.28

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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.