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Finding the Fourth Proportional to 128,133.90, 192,203.89 and 39,388.17

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Solution

The fourth proportional to 128,133.90, 192,203.89 and 39,388.17 is: 59,083.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,133.90 : 192,203.89 = 39,388.17 : x
  2. Step 2: Convert to fraction form
    128,133.90/192,203.89 = 39,388.17/x
  3. Step 3: Cross multiply
    128,133.90x = 192,203.89 × 39,388.17
  4. Step 4: Simplify right side
    128,133.90x = 7,570,560,116.28
  5. Step 5: Solve for x
    x = 7,570,560,116.28/128,133.90
  6. Step 6: Final answer
    x = 59,083.19

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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.