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Finding the Fourth Proportional to 128,753.01, 193,169.79 and 57,735.18

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Solution

The fourth proportional to 128,753.01, 193,169.79 and 57,735.18 is: 86,620.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,753.01 : 193,169.79 = 57,735.18 : x
  2. Step 2: Convert to fraction form
    128,753.01/193,169.79 = 57,735.18/x
  3. Step 3: Cross multiply
    128,753.01x = 193,169.79 × 57,735.18
  4. Step 4: Simplify right side
    128,753.01x = 11,152,692,596.21
  5. Step 5: Solve for x
    x = 11,152,692,596.21/128,753.01
  6. Step 6: Final answer
    x = 86,620.83

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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.