Home / 136,600.40-188,507.74-76,171.78

Finding the Fourth Proportional to 136,600.40, 188,507.74 and 76,171.78

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Solution

The fourth proportional to 136,600.40, 188,507.74 and 76,171.78 is: 105,116.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,600.40 : 188,507.74 = 76,171.78 : x
  2. Step 2: Convert to fraction form
    136,600.40/188,507.74 = 76,171.78/x
  3. Step 3: Cross multiply
    136,600.40x = 188,507.74 × 76,171.78
  4. Step 4: Simplify right side
    136,600.40x = 14,358,970,099.58
  5. Step 5: Solve for x
    x = 14,358,970,099.58/136,600.40
  6. Step 6: Final answer
    x = 105,116.60

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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.