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Finding the Fourth Proportional to 128,692.89, 192,973.51 and 53,792.59

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Solution

The fourth proportional to 128,692.89, 192,973.51 and 53,792.59 is: 80,661.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,692.89 : 192,973.51 = 53,792.59 : x
  2. Step 2: Convert to fraction form
    128,692.89/192,973.51 = 53,792.59/x
  3. Step 3: Cross multiply
    128,692.89x = 192,973.51 × 53,792.59
  4. Step 4: Simplify right side
    128,692.89x = 10,380,544,904.29
  5. Step 5: Solve for x
    x = 10,380,544,904.29/128,692.89
  6. Step 6: Final answer
    x = 80,661.37

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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.