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Finding the Fourth Proportional to 128,675.70, 193,032.18 and 39,936.38

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Solution

The fourth proportional to 128,675.70, 193,032.18 and 39,936.38 is: 59,910.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.70 : 193,032.18 = 39,936.38 : x
  2. Step 2: Convert to fraction form
    128,675.70/193,032.18 = 39,936.38/x
  3. Step 3: Cross multiply
    128,675.70x = 193,032.18 × 39,936.38
  4. Step 4: Simplify right side
    128,675.70x = 7,709,005,527.55
  5. Step 5: Solve for x
    x = 7,709,005,527.55/128,675.70
  6. Step 6: Final answer
    x = 59,910.34

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1.5x scale

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.