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Finding the Fourth Proportional to 99,216.82, 136,921.68 and 53,894.79

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Solution

The fourth proportional to 99,216.82, 136,921.68 and 53,894.79 is: 74,376.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,216.82 : 136,921.68 = 53,894.79 : x
  2. Step 2: Convert to fraction form
    99,216.82/136,921.68 = 53,894.79/x
  3. Step 3: Cross multiply
    99,216.82x = 136,921.68 × 53,894.79
  4. Step 4: Simplify right side
    99,216.82x = 7,379,365,190.05
  5. Step 5: Solve for x
    x = 7,379,365,190.05/99,216.82
  6. Step 6: Final answer
    x = 74,376.15

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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.