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Finding the Fourth Proportional to 99,288, 136,923.14 and 65,325.31

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Solution

The fourth proportional to 99,288, 136,923.14 and 65,325.31 is: 90,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,288 : 136,923.14 = 65,325.31 : x
  2. Step 2: Convert to fraction form
    99,288/136,923.14 = 65,325.31/x
  3. Step 3: Cross multiply
    99,288x = 136,923.14 × 65,325.31
  4. Step 4: Simplify right side
    99,288x = 8,944,546,387.68
  5. Step 5: Solve for x
    x = 8,944,546,387.68/99,288
  6. Step 6: Final answer
    x = 90,086.88

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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.