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Finding the Fourth Proportional to 55,258.70, 82,920.45 and 20,201.90

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Solution

The fourth proportional to 55,258.70, 82,920.45 and 20,201.90 is: 30,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,258.70 : 82,920.45 = 20,201.90 : x
  2. Step 2: Convert to fraction form
    55,258.70/82,920.45 = 20,201.90/x
  3. Step 3: Cross multiply
    55,258.70x = 82,920.45 × 20,201.90
  4. Step 4: Simplify right side
    55,258.70x = 1,675,150,638.86
  5. Step 5: Solve for x
    x = 1,675,150,638.86/55,258.70
  6. Step 6: Final answer
    x = 30,314.70

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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.