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Finding the Fourth Proportional to 55,163.70, 82,745.09 and 15,720.93

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Solution

The fourth proportional to 55,163.70, 82,745.09 and 15,720.93 is: 23,581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,163.70 : 82,745.09 = 15,720.93 : x
  2. Step 2: Convert to fraction form
    55,163.70/82,745.09 = 15,720.93/x
  3. Step 3: Cross multiply
    55,163.70x = 82,745.09 × 15,720.93
  4. Step 4: Simplify right side
    55,163.70x = 1,300,829,689.13
  5. Step 5: Solve for x
    x = 1,300,829,689.13/55,163.70
  6. Step 6: Final answer
    x = 23,581.26

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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.