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Finding the Fourth Proportional to 126,251.20, 189,376.80 and 103,700.80

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Solution

The fourth proportional to 126,251.20, 189,376.80 and 103,700.80 is: 155,551.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,251.20 : 189,376.80 = 103,700.80 : x
  2. Step 2: Convert to fraction form
    126,251.20/189,376.80 = 103,700.80/x
  3. Step 3: Cross multiply
    126,251.20x = 189,376.80 × 103,700.80
  4. Step 4: Simplify right side
    126,251.20x = 19,638,525,661.44
  5. Step 5: Solve for x
    x = 19,638,525,661.44/126,251.20
  6. Step 6: Final answer
    x = 155,551.20

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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.