Home / 280,965.78-421,512.18-81,302.22

Finding the Fourth Proportional to 280,965.78, 421,512.18 and 81,302.22

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Solution

The fourth proportional to 280,965.78, 421,512.18 and 81,302.22 is: 121,971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,965.78 : 421,512.18 = 81,302.22 : x
  2. Step 2: Convert to fraction form
    280,965.78/421,512.18 = 81,302.22/x
  3. Step 3: Cross multiply
    280,965.78x = 421,512.18 × 81,302.22
  4. Step 4: Simplify right side
    280,965.78x = 34,269,875,991.04
  5. Step 5: Solve for x
    x = 34,269,875,991.04/280,965.78
  6. Step 6: Final answer
    x = 121,971.71

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1.5x scale

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.