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Finding the Fourth Proportional to 126,496.62, 189,745.20 and 86,934.06

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Solution

The fourth proportional to 126,496.62, 189,745.20 and 86,934.06 is: 130,401.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,496.62 : 189,745.20 = 86,934.06 : x
  2. Step 2: Convert to fraction form
    126,496.62/189,745.20 = 86,934.06/x
  3. Step 3: Cross multiply
    126,496.62x = 189,745.20 × 86,934.06
  4. Step 4: Simplify right side
    126,496.62x = 16,495,320,601.51
  5. Step 5: Solve for x
    x = 16,495,320,601.51/126,496.62
  6. Step 6: Final answer
    x = 130,401.28

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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.