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Finding the Fourth Proportional to 126,271.20, 189,061.20 and 98,623.20

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Solution

The fourth proportional to 126,271.20, 189,061.20 and 98,623.20 is: 147,664.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,271.20 : 189,061.20 = 98,623.20 : x
  2. Step 2: Convert to fraction form
    126,271.20/189,061.20 = 98,623.20/x
  3. Step 3: Cross multiply
    126,271.20x = 189,061.20 × 98,623.20
  4. Step 4: Simplify right side
    126,271.20x = 18,645,820,539.84
  5. Step 5: Solve for x
    x = 18,645,820,539.84/126,271.20
  6. Step 6: Final answer
    x = 147,664.87

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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.