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Finding the Fourth Proportional to 99,062.64, 136,546.62 and 81,126

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Solution

The fourth proportional to 99,062.64, 136,546.62 and 81,126 is: 111,822.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,062.64 : 136,546.62 = 81,126 : x
  2. Step 2: Convert to fraction form
    99,062.64/136,546.62 = 81,126/x
  3. Step 3: Cross multiply
    99,062.64x = 136,546.62 × 81,126
  4. Step 4: Simplify right side
    99,062.64x = 11,077,481,094.12
  5. Step 5: Solve for x
    x = 11,077,481,094.12/99,062.64
  6. Step 6: Final answer
    x = 111,822.99

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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.