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Finding the Fourth Proportional to 99,651.38, 137,524.37 and 57,212.64

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Solution

The fourth proportional to 99,651.38, 137,524.37 and 57,212.64 is: 78,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651.38 : 137,524.37 = 57,212.64 : x
  2. Step 2: Convert to fraction form
    99,651.38/137,524.37 = 57,212.64/x
  3. Step 3: Cross multiply
    99,651.38x = 137,524.37 × 57,212.64
  4. Step 4: Simplify right side
    99,651.38x = 7,868,131,985.97
  5. Step 5: Solve for x
    x = 7,868,131,985.97/99,651.38
  6. Step 6: Final answer
    x = 78,956.58

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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.