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Finding the Fourth Proportional to 136,883.84, 188,886.36 and 76,449.68

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Solution

The fourth proportional to 136,883.84, 188,886.36 and 76,449.68 is: 105,493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,883.84 : 188,886.36 = 76,449.68 : x
  2. Step 2: Convert to fraction form
    136,883.84/188,886.36 = 76,449.68/x
  3. Step 3: Cross multiply
    136,883.84x = 188,886.36 × 76,449.68
  4. Step 4: Simplify right side
    136,883.84x = 14,440,301,778.36
  5. Step 5: Solve for x
    x = 14,440,301,778.36/136,883.84
  6. Step 6: Final answer
    x = 105,493.11

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1.5x scale

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.