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Finding the Fourth Proportional to 99,133.74, 136,857.87 and 76,422.96

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Solution

The fourth proportional to 99,133.74, 136,857.87 and 76,422.96 is: 105,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,133.74 : 136,857.87 = 76,422.96 : x
  2. Step 2: Convert to fraction form
    99,133.74/136,857.87 = 76,422.96/x
  3. Step 3: Cross multiply
    99,133.74x = 136,857.87 × 76,422.96
  4. Step 4: Simplify right side
    99,133.74x = 10,459,083,524.70
  5. Step 5: Solve for x
    x = 10,459,083,524.70/99,133.74
  6. Step 6: Final answer
    x = 105,504.78

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1.5x scale

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.