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Finding the Fourth Proportional to 99,212.88, 136,914.80 and 53,891.32

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Solution

The fourth proportional to 99,212.88, 136,914.80 and 53,891.32 is: 74,370.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,212.88 : 136,914.80 = 53,891.32 : x
  2. Step 2: Convert to fraction form
    99,212.88/136,914.80 = 53,891.32/x
  3. Step 3: Cross multiply
    99,212.88x = 136,914.80 × 53,891.32
  4. Step 4: Simplify right side
    99,212.88x = 7,378,519,299.54
  5. Step 5: Solve for x
    x = 7,378,519,299.54/99,212.88
  6. Step 6: Final answer
    x = 74,370.58

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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.