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Finding the Fourth Proportional to 79,147.72, 118,716.54 and 19,983.16

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Solution

The fourth proportional to 79,147.72, 118,716.54 and 19,983.16 is: 29,973.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,147.72 : 118,716.54 = 19,983.16 : x
  2. Step 2: Convert to fraction form
    79,147.72/118,716.54 = 19,983.16/x
  3. Step 3: Cross multiply
    79,147.72x = 118,716.54 × 19,983.16
  4. Step 4: Simplify right side
    79,147.72x = 2,372,331,613.47
  5. Step 5: Solve for x
    x = 2,372,331,613.47/79,147.72
  6. Step 6: Final answer
    x = 29,973.47

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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.