Home / 280,945.92-421,356.48-81,222.72

Finding the Fourth Proportional to 280,945.92, 421,356.48 and 81,222.72

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Solution

The fourth proportional to 280,945.92, 421,356.48 and 81,222.72 is: 121,816.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,945.92 : 421,356.48 = 81,222.72 : x
  2. Step 2: Convert to fraction form
    280,945.92/421,356.48 = 81,222.72/x
  3. Step 3: Cross multiply
    280,945.92x = 421,356.48 × 81,222.72
  4. Step 4: Simplify right side
    280,945.92x = 34,223,719,395.23
  5. Step 5: Solve for x
    x = 34,223,719,395.23/280,945.92
  6. Step 6: Final answer
    x = 121,816.04

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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.