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Finding the Fourth Proportional to 136,638.68, 204,908.81 and 57,759.03

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Solution

The fourth proportional to 136,638.68, 204,908.81 and 57,759.03 is: 86,617.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,638.68 : 204,908.81 = 57,759.03 : x
  2. Step 2: Convert to fraction form
    136,638.68/204,908.81 = 57,759.03/x
  3. Step 3: Cross multiply
    136,638.68x = 204,908.81 × 57,759.03
  4. Step 4: Simplify right side
    136,638.68x = 11,835,333,815.26
  5. Step 5: Solve for x
    x = 11,835,333,815.26/136,638.68
  6. Step 6: Final answer
    x = 86,617.74

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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.