Home / 126,495.60-189,743.40-76,729.20

Finding the Fourth Proportional to 126,495.60, 189,743.40 and 76,729.20

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Solution

The fourth proportional to 126,495.60, 189,743.40 and 76,729.20 is: 115,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,495.60 : 189,743.40 = 76,729.20 : x
  2. Step 2: Convert to fraction form
    126,495.60/189,743.40 = 76,729.20/x
  3. Step 3: Cross multiply
    126,495.60x = 189,743.40 × 76,729.20
  4. Step 4: Simplify right side
    126,495.60x = 14,558,859,287.28
  5. Step 5: Solve for x
    x = 14,558,859,287.28/126,495.60
  6. Step 6: Final answer
    x = 115,093.80

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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.