Home / 280,922.58-421,320.69-81,198.45

Finding the Fourth Proportional to 280,922.58, 421,320.69 and 81,198.45

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Solution

The fourth proportional to 280,922.58, 421,320.69 and 81,198.45 is: 121,779.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,922.58 : 421,320.69 = 81,198.45 : x
  2. Step 2: Convert to fraction form
    280,922.58/421,320.69 = 81,198.45/x
  3. Step 3: Cross multiply
    280,922.58x = 421,320.69 × 81,198.45
  4. Step 4: Simplify right side
    280,922.58x = 34,210,586,980.93
  5. Step 5: Solve for x
    x = 34,210,586,980.93/280,922.58
  6. Step 6: Final answer
    x = 121,779.41

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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.