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Finding the Fourth Proportional to 56,548.80, 84,769.20 and 21,000.60

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Solution

The fourth proportional to 56,548.80, 84,769.20 and 21,000.60 is: 31,480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,548.80 : 84,769.20 = 21,000.60 : x
  2. Step 2: Convert to fraction form
    56,548.80/84,769.20 = 21,000.60/x
  3. Step 3: Cross multiply
    56,548.80x = 84,769.20 × 21,000.60
  4. Step 4: Simplify right side
    56,548.80x = 1,780,204,061.52
  5. Step 5: Solve for x
    x = 1,780,204,061.52/56,548.80
  6. Step 6: Final answer
    x = 31,480.85

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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.