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Finding the Fourth Proportional to 55,867.92, 83,779.92 and 20,320.80

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Solution

The fourth proportional to 55,867.92, 83,779.92 and 20,320.80 is: 30,473.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,867.92 : 83,779.92 = 20,320.80 : x
  2. Step 2: Convert to fraction form
    55,867.92/83,779.92 = 20,320.80/x
  3. Step 3: Cross multiply
    55,867.92x = 83,779.92 × 20,320.80
  4. Step 4: Simplify right side
    55,867.92x = 1,702,474,998.34
  5. Step 5: Solve for x
    x = 1,702,474,998.34/55,867.92
  6. Step 6: Final answer
    x = 30,473.21

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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.