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Finding the Fourth Proportional to 56,163.78, 84,180.87 and 21,081.06

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Solution

The fourth proportional to 56,163.78, 84,180.87 and 21,081.06 is: 31,597.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,163.78 : 84,180.87 = 21,081.06 : x
  2. Step 2: Convert to fraction form
    56,163.78/84,180.87 = 21,081.06/x
  3. Step 3: Cross multiply
    56,163.78x = 84,180.87 × 21,081.06
  4. Step 4: Simplify right side
    56,163.78x = 1,774,621,971.32
  5. Step 5: Solve for x
    x = 1,774,621,971.32/56,163.78
  6. Step 6: Final answer
    x = 31,597.27

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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.