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Finding the Fourth Proportional to 136,321.80, 188,120.42 and 75,892.46

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Solution

The fourth proportional to 136,321.80, 188,120.42 and 75,892.46 is: 104,729.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,321.80 : 188,120.42 = 75,892.46 : x
  2. Step 2: Convert to fraction form
    136,321.80/188,120.42 = 75,892.46/x
  3. Step 3: Cross multiply
    136,321.80x = 188,120.42 × 75,892.46
  4. Step 4: Simplify right side
    136,321.80x = 14,276,920,699.16
  5. Step 5: Solve for x
    x = 14,276,920,699.16/136,321.80
  6. Step 6: Final answer
    x = 104,729.55

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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.