Home / 126,778.72-189,609.16-112,830.52

Finding the Fourth Proportional to 126,778.72, 189,609.16 and 112,830.52

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Solution

The fourth proportional to 126,778.72, 189,609.16 and 112,830.52 is: 168,748.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,778.72 : 189,609.16 = 112,830.52 : x
  2. Step 2: Convert to fraction form
    126,778.72/189,609.16 = 112,830.52/x
  3. Step 3: Cross multiply
    126,778.72x = 189,609.16 × 112,830.52
  4. Step 4: Simplify right side
    126,778.72x = 21,393,700,119.56
  5. Step 5: Solve for x
    x = 21,393,700,119.56/126,778.72
  6. Step 6: Final answer
    x = 168,748.35

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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.