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Finding the Fourth Proportional to 85,326.30, 128,003.45 and 37,957.73

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Solution

The fourth proportional to 85,326.30, 128,003.45 and 37,957.73 is: 56,942.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,326.30 : 128,003.45 = 37,957.73 : x
  2. Step 2: Convert to fraction form
    85,326.30/128,003.45 = 37,957.73/x
  3. Step 3: Cross multiply
    85,326.30x = 128,003.45 × 37,957.73
  4. Step 4: Simplify right side
    85,326.30x = 4,858,719,564.36
  5. Step 5: Solve for x
    x = 4,858,719,564.36/85,326.30
  6. Step 6: Final answer
    x = 56,942.81

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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.