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Finding the Fourth Proportional to 99,063.64, 136,548 and 81,127

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Solution

The fourth proportional to 99,063.64, 136,548 and 81,127 is: 111,824.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,063.64 : 136,548 = 81,127 : x
  2. Step 2: Convert to fraction form
    99,063.64/136,548 = 81,127/x
  3. Step 3: Cross multiply
    99,063.64x = 136,548 × 81,127
  4. Step 4: Simplify right side
    99,063.64x = 11,077,729,596
  5. Step 5: Solve for x
    x = 11,077,729,596/99,063.64
  6. Step 6: Final answer
    x = 111,824.37

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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.