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Finding the Fourth Proportional to 166,820, 230,211.60 and 91,370.12

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Solution

The fourth proportional to 166,820, 230,211.60 and 91,370.12 is: 126,090.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,820 : 230,211.60 = 91,370.12 : x
  2. Step 2: Convert to fraction form
    166,820/230,211.60 = 91,370.12/x
  3. Step 3: Cross multiply
    166,820x = 230,211.60 × 91,370.12
  4. Step 4: Simplify right side
    166,820x = 21,034,461,517.39
  5. Step 5: Solve for x
    x = 21,034,461,517.39/166,820
  6. Step 6: Final answer
    x = 126,090.77

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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.