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Finding the Fourth Proportional to 55,128.60, 82,676.70 and 21,837.60

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Solution

The fourth proportional to 55,128.60, 82,676.70 and 21,837.60 is: 32,749.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,128.60 : 82,676.70 = 21,837.60 : x
  2. Step 2: Convert to fraction form
    55,128.60/82,676.70 = 21,837.60/x
  3. Step 3: Cross multiply
    55,128.60x = 82,676.70 × 21,837.60
  4. Step 4: Simplify right side
    55,128.60x = 1,805,460,703.92
  5. Step 5: Solve for x
    x = 1,805,460,703.92/55,128.60
  6. Step 6: Final answer
    x = 32,749.98

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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.