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Finding the Fourth Proportional to 92,725.72, 138,861.72 and 83,740.12

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Solution

The fourth proportional to 92,725.72, 138,861.72 and 83,740.12 is: 125,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,725.72 : 138,861.72 = 83,740.12 : x
  2. Step 2: Convert to fraction form
    92,725.72/138,861.72 = 83,740.12/x
  3. Step 3: Cross multiply
    92,725.72x = 138,861.72 × 83,740.12
  4. Step 4: Simplify right side
    92,725.72x = 11,628,297,096.21
  5. Step 5: Solve for x
    x = 11,628,297,096.21/92,725.72
  6. Step 6: Final answer
    x = 125,405.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.