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Finding the Fourth Proportional to 126,003, 189,004.92 and 86,440.20

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Solution

The fourth proportional to 126,003, 189,004.92 and 86,440.20 is: 129,660.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,003 : 189,004.92 = 86,440.20 : x
  2. Step 2: Convert to fraction form
    126,003/189,004.92 = 86,440.20/x
  3. Step 3: Cross multiply
    126,003x = 189,004.92 × 86,440.20
  4. Step 4: Simplify right side
    126,003x = 16,337,623,085.78
  5. Step 5: Solve for x
    x = 16,337,623,085.78/126,003
  6. Step 6: Final answer
    x = 129,660.59

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1.5x scale

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.