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Finding the Fourth Proportional to 136,693.80, 204,942.28 and 83,994.40

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Solution

The fourth proportional to 136,693.80, 204,942.28 and 83,994.40 is: 125,931.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,693.80 : 204,942.28 = 83,994.40 : x
  2. Step 2: Convert to fraction form
    136,693.80/204,942.28 = 83,994.40/x
  3. Step 3: Cross multiply
    136,693.80x = 204,942.28 × 83,994.40
  4. Step 4: Simplify right side
    136,693.80x = 17,214,003,843.23
  5. Step 5: Solve for x
    x = 17,214,003,843.23/136,693.80
  6. Step 6: Final answer
    x = 125,931.12

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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.