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Finding the Fourth Proportional to 136,893.87, 188,911.53 and 76,465.35

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Solution

The fourth proportional to 136,893.87, 188,911.53 and 76,465.35 is: 105,521.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,893.87 : 188,911.53 = 76,465.35 : x
  2. Step 2: Convert to fraction form
    136,893.87/188,911.53 = 76,465.35/x
  3. Step 3: Cross multiply
    136,893.87x = 188,911.53 × 76,465.35
  4. Step 4: Simplify right side
    136,893.87x = 14,445,186,260.49
  5. Step 5: Solve for x
    x = 14,445,186,260.49/136,893.87
  6. Step 6: Final answer
    x = 105,521.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.