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Finding the Fourth Proportional to 55,809.60, 83,568.60 and 53,185.20

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Solution

The fourth proportional to 55,809.60, 83,568.60 and 53,185.20 is: 79,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,809.60 : 83,568.60 = 53,185.20 : x
  2. Step 2: Convert to fraction form
    55,809.60/83,568.60 = 53,185.20/x
  3. Step 3: Cross multiply
    55,809.60x = 83,568.60 × 53,185.20
  4. Step 4: Simplify right side
    55,809.60x = 4,444,612,704.72
  5. Step 5: Solve for x
    x = 4,444,612,704.72/55,809.60
  6. Step 6: Final answer
    x = 79,638.86

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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.