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Finding the Fourth Proportional to 56,105.20, 84,190.20 and 21,048.40

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Solution

The fourth proportional to 56,105.20, 84,190.20 and 21,048.40 is: 31,584.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,105.20 : 84,190.20 = 21,048.40 : x
  2. Step 2: Convert to fraction form
    56,105.20/84,190.20 = 21,048.40/x
  3. Step 3: Cross multiply
    56,105.20x = 84,190.20 × 21,048.40
  4. Step 4: Simplify right side
    56,105.20x = 1,772,069,005.68
  5. Step 5: Solve for x
    x = 1,772,069,005.68/56,105.20
  6. Step 6: Final answer
    x = 31,584.76

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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.