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Finding the Fourth Proportional to 78,701.67, 108,522.57 and 53,163.72

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Solution

The fourth proportional to 78,701.67, 108,522.57 and 53,163.72 is: 73,308.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,701.67 : 108,522.57 = 53,163.72 : x
  2. Step 2: Convert to fraction form
    78,701.67/108,522.57 = 53,163.72/x
  3. Step 3: Cross multiply
    78,701.67x = 108,522.57 × 53,163.72
  4. Step 4: Simplify right side
    78,701.67x = 5,769,463,525.16
  5. Step 5: Solve for x
    x = 5,769,463,525.16/78,701.67
  6. Step 6: Final answer
    x = 73,308.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.