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Finding the Fourth Proportional to 136,695.88, 188,639.73 and 76,266.57

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Solution

The fourth proportional to 136,695.88, 188,639.73 and 76,266.57 is: 105,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,695.88 : 188,639.73 = 76,266.57 : x
  2. Step 2: Convert to fraction form
    136,695.88/188,639.73 = 76,266.57/x
  3. Step 3: Cross multiply
    136,695.88x = 188,639.73 × 76,266.57
  4. Step 4: Simplify right side
    136,695.88x = 14,386,905,172.83
  5. Step 5: Solve for x
    x = 14,386,905,172.83/136,695.88
  6. Step 6: Final answer
    x = 105,247.54

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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.