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Finding the Fourth Proportional to 136,937.55, 188,956.68 and 76,505.88

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Solution

The fourth proportional to 136,937.55, 188,956.68 and 76,505.88 is: 105,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,937.55 : 188,956.68 = 76,505.88 : x
  2. Step 2: Convert to fraction form
    136,937.55/188,956.68 = 76,505.88/x
  3. Step 3: Cross multiply
    136,937.55x = 188,956.68 × 76,505.88
  4. Step 4: Simplify right side
    136,937.55x = 14,456,297,085.28
  5. Step 5: Solve for x
    x = 14,456,297,085.28/136,937.55
  6. Step 6: Final answer
    x = 105,568.54

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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.