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Finding the Fourth Proportional to 56,632.80, 84,895.20 and 21,084.60

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Solution

The fourth proportional to 56,632.80, 84,895.20 and 21,084.60 is: 31,606.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,632.80 : 84,895.20 = 21,084.60 : x
  2. Step 2: Convert to fraction form
    56,632.80/84,895.20 = 21,084.60/x
  3. Step 3: Cross multiply
    56,632.80x = 84,895.20 × 21,084.60
  4. Step 4: Simplify right side
    56,632.80x = 1,789,981,333.92
  5. Step 5: Solve for x
    x = 1,789,981,333.92/56,632.80
  6. Step 6: Final answer
    x = 31,606.80

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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.