Home / 280,914.72-421,384.39-81,255.29

Finding the Fourth Proportional to 280,914.72, 421,384.39 and 81,255.29

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Solution

The fourth proportional to 280,914.72, 421,384.39 and 81,255.29 is: 121,886.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,914.72 : 421,384.39 = 81,255.29 : x
  2. Step 2: Convert to fraction form
    280,914.72/421,384.39 = 81,255.29/x
  3. Step 3: Cross multiply
    280,914.72x = 421,384.39 × 81,255.29
  4. Step 4: Simplify right side
    280,914.72x = 34,239,712,513.35
  5. Step 5: Solve for x
    x = 34,239,712,513.35/280,914.72
  6. Step 6: Final answer
    x = 121,886.50

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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.