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Finding the Fourth Proportional to 99,230, 136,939.56 and 54,518

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Solution

The fourth proportional to 99,230, 136,939.56 and 54,518 is: 75,236.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,230 : 136,939.56 = 54,518 : x
  2. Step 2: Convert to fraction form
    99,230/136,939.56 = 54,518/x
  3. Step 3: Cross multiply
    99,230x = 136,939.56 × 54,518
  4. Step 4: Simplify right side
    99,230x = 7,465,670,932.08
  5. Step 5: Solve for x
    x = 7,465,670,932.08/99,230
  6. Step 6: Final answer
    x = 75,236.03

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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.