Home / 280,836.40-421,254.60-81,163.30

Finding the Fourth Proportional to 280,836.40, 421,254.60 and 81,163.30

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Solution

The fourth proportional to 280,836.40, 421,254.60 and 81,163.30 is: 121,744.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,836.40 : 421,254.60 = 81,163.30 : x
  2. Step 2: Convert to fraction form
    280,836.40/421,254.60 = 81,163.30/x
  3. Step 3: Cross multiply
    280,836.40x = 421,254.60 × 81,163.30
  4. Step 4: Simplify right side
    280,836.40x = 34,190,413,476.18
  5. Step 5: Solve for x
    x = 34,190,413,476.18/280,836.40
  6. Step 6: Final answer
    x = 121,744.95

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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.