Home / 280,836.30-421,254.45-81,163.20

Finding the Fourth Proportional to 280,836.30, 421,254.45 and 81,163.20

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Solution

The fourth proportional to 280,836.30, 421,254.45 and 81,163.20 is: 121,744.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,836.30 : 421,254.45 = 81,163.20 : x
  2. Step 2: Convert to fraction form
    280,836.30/421,254.45 = 81,163.20/x
  3. Step 3: Cross multiply
    280,836.30x = 421,254.45 × 81,163.20
  4. Step 4: Simplify right side
    280,836.30x = 34,190,359,176.24
  5. Step 5: Solve for x
    x = 34,190,359,176.24/280,836.30
  6. Step 6: Final answer
    x = 121,744.80

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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.