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Finding the Fourth Proportional to 56,469.20, 84,737.40 and 21,412.40

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Solution

The fourth proportional to 56,469.20, 84,737.40 and 21,412.40 is: 32,131.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,469.20 : 84,737.40 = 21,412.40 : x
  2. Step 2: Convert to fraction form
    56,469.20/84,737.40 = 21,412.40/x
  3. Step 3: Cross multiply
    56,469.20x = 84,737.40 × 21,412.40
  4. Step 4: Simplify right side
    56,469.20x = 1,814,431,103.76
  5. Step 5: Solve for x
    x = 1,814,431,103.76/56,469.20
  6. Step 6: Final answer
    x = 32,131.34

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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.