Home / 280,736.96-421,043.54-81,013.95

Finding the Fourth Proportional to 280,736.96, 421,043.54 and 81,013.95

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Solution

The fourth proportional to 280,736.96, 421,043.54 and 81,013.95 is: 121,503.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,736.96 : 421,043.54 = 81,013.95 : x
  2. Step 2: Convert to fraction form
    280,736.96/421,043.54 = 81,013.95/x
  3. Step 3: Cross multiply
    280,736.96x = 421,043.54 × 81,013.95
  4. Step 4: Simplify right side
    280,736.96x = 34,110,399,892.31
  5. Step 5: Solve for x
    x = 34,110,399,892.31/280,736.96
  6. Step 6: Final answer
    x = 121,503.06

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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.