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Finding the Fourth Proportional to 128,241.92, 192,302.33 and 74,949.18

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Solution

The fourth proportional to 128,241.92, 192,302.33 and 74,949.18 is: 112,388.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,241.92 : 192,302.33 = 74,949.18 : x
  2. Step 2: Convert to fraction form
    128,241.92/192,302.33 = 74,949.18/x
  3. Step 3: Cross multiply
    128,241.92x = 192,302.33 × 74,949.18
  4. Step 4: Simplify right side
    128,241.92x = 14,412,901,570.84
  5. Step 5: Solve for x
    x = 14,412,901,570.84/128,241.92
  6. Step 6: Final answer
    x = 112,388.38

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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.